DATA LIST

Except as noted, these are design data, from Legends (generally from the Covers). The number in parentheses after numbers of guns is rounds per gun. TT are torpedo tubes. Complement is as the ship was designed or completed, not as she was later operated; numbers could vary considerably. Prior to the Washington Conference (1921), displacements were given as ‘legend’ or ‘normal’ or ‘Navy List’ and deep load.

Standard displacement was a somewhat artificial figure. Where available, for post-1921 ships loads, including equipment, are divided into those contributing to standard displacement and extras (including extra machinery weight, due to machinery stores) included only in deep load. RFW is Reserve Feed Water. Note that some armament weight (e.g., additional ammunition) was included only in deep displacement. Aircraft, when carried, were included in armament weight.

The 1921 and 1930 Treaties gave pre-Treaty ships standard displacements equal to their earlier ‘normal’ or ‘Navy List’ displacements, which included fuel and reserve feed water, and thus considerably exceeded standard displacements calculated according to the new treaty procedures. The effect of this procedure was to down-play the jump in cruiser (and, for that matter, battleship) size when new ships were built, as in their case standard displacement excluded fuel and reserve feed water, and was closer to light ship displacement.

Actual, as opposed to design, data are from Inclining Experiments, indicated as IX, with their dates.

Inclining experiment data for cruisers, particularly during the Second World War, are from Constructors’ Notebooks, which describe the experiments (and often provide earlier figures for comparison). These figures rarely included the standard displacement, which was an artificial figure. The half-oil condition was sometimes called the average action condition. Constructors evaluated the effect on stability of all proposed modifications, including small ones such as adding water coolers for drinking water. Thus Constructors’ Notebooks, particularly those compiled by A J Neal in 1943-53, also describe various proposed modifications, which are mentioned in the notes below. Unfortunately it is not generally clear whether proposed modifications were actually made.

A few general proposed modifications are best mentioned here:

1. Installation of Action Information Centres (AIC). This was difficult because the British AIC differed considerably in concept from the US CIC. The US Navy had a single space built around a radar plot, while the Royal Navy emphasised the need for different users to have full access to a plot. Thus the Command on the bridge (compass platform) needed direct sight (via a viewing glass looking down) of a (largely surface) plot. Aircraft direction required a different kind of plot, in an Aircraft Direction Room. A third kind of plot, in a Target Indication Room, was used to allocate targets to directors and weapons. A flagship needed another plot, for the admiral trying to co-ordinate a force. In the British view, the multi-purpose US CIC was crowded to the point where it could not function effectively. A critique of US ASW performance in the post-war Exercise Mainbrace suggested that the US system provided so little information to the Command on the bridge that ASW performance was badly degraded. Conversely, installation of an AIC entailed major reconstruction of a ship’s bridge. This was the reconstruction of bridges in the cruisers Birmingham and Newcastle in 1950-2, in which topweight was reduced by using light alloys for internal partitions.

2. Replacement of existing HA directors by Mk VI, which was expected to provide blind-fire capability using its Type 275 radar. Estimates were prepared for the heavy cruisers and for the Leander class and HMAS Hobart, generally in connection with landing ‘X’ turret.

3. Air-conditioning. Fitting of individual air-conditioners was apparently ordered about October 1944, probably in connection with planned deployments to the Pacific (the notebooks do not say as much, but they include calculations and an account of overall air-conditioning policy).

4. Replacement of torpedo tubes by additional light anti-aircraft guns (generally Bofors guns) in the British Pacific Fleet, formally authorised on 2 June 1945. Torpedo tubes were restored post-war in at least some ships. It is not clear how many ships were modified, and reports in this file are ambiguous.

5. In 1943 surviving ‘C’ and ‘D’ class (non-AA) cruisers were ordered modified for shore bombardment, presumably initially to support the D-Day landings. The most important change was installation of a special indirect-fire director, i.e., a director which could aim the ships’ 6in batteries at a designated shore target which could not be seen from the ship. In May, the ships were ordered refitted but not modernised. Alterations to gun armament were to be limited to substituting twin Oerlikons for existing singles and for single pompoms (2pdrs) in ships on ocean escort duty. In the ‘D’ class, the centreline (after) 4in HA gun was to be replaced by as many single and twin Oerlikons as possible. The two sided 3in (‘C’ Class) or 4in (‘D’ class) HA guns were retained to fire star shell. By July, plans called for landing the torpedo tubes and two 36in searchlights in these ships and adding the indirect-fire director. In the ‘C’ Class, seven single Oerlikons were to be replaced by twins, and four more twin Oerlikons added (two of them on the boiler room vents). In the ‘D’ class eight singles were replaced by twins and four twins (the most for which there was space: two of them were on the centreline) added. Installation of Type 970 radar (the shipboard version of the aircraft H2S, used for landing-craft navigation close inshore) was considered but rejected, and the ships no longer needed air-warning radars. Boats were reduced to one motor cutter and one whaler; all un-needed davits were landed. Ships involved were Ceres, Capetown and Dauntless. An earlier proposal for Ceres (April 1943) envisaged something like what was done to HMS Danae; all torpedo tubes, the after controls, the 3in guns and the single pompoms (and some boats) would be landed, and single 4in gun with barrage director, two quadruple pompoms (with directors and radars), and two twin Oerlikons added, as well as a 44in searchlight and a D/F office. Asdic and radar Types 291 and 271M (or 276) would have been installed. This project presumably paralleled the ‘D’ class reconstructions, and it died with them. Estimated deep displacement of the modernised ship was 5,458 tons. According to the official ship data book (CB 1815), Capetown retained her two single pompoms. Both ships had fourteen single Oerlikons in 1945.

6. The three surviving anti-aircraft cruisers in 1944-5, Caledon, Colombo and Delhi, had (or were planned for) a major radar refit in which the normally land-based GCI (ground-controlled intercept) radar as well as the new Type 277 (in place of the existing Type 273) were installed. Ships also had army-type single hand-worked Bofors installed with their predictors. For Caledon these were to be additional to her existing battery, for Colombo in place of two twin Bofors Hazemeyers, and for Delhi in addition to her existing battery. Calculations were dated 10 July 1944. In January 1945 calculations were made on rearrangement of close-range anti-aircraft weapons on board Colombo: two twin power Oerlikons were removed, and two single Bofors guns added on the forward superstructure deck and two on the after superstructure deck. In 1945 both Colombo and Caledon were credited with four single Bofors in addition to their other armament (four twin Bofors and, respectively, four and six twin Oerlikons and two and three singles). Note that the data card for Caledon shows her with (presumably an initial AA armament) of one twin and two single Bofors, and four twin and three single Oerlikons. It seems unlikely that the radar upgrade was carried out. Delhi apparently did not receive the single Bofors.

The constructors’ notes suggest that most or all modifications made when ships were refitted in the United States were analysed and approved not by constructors on the staff of the British Admiralty Delegation in Washington, but rather by the same Section 9 constructors (particularly Neal) responsible for analysing changes planned in the United Kingdom. These notes also show that the British constructors were unaware of changes made to ships in Australia and in New Zealand, because when considering further changes to ships (e.g., HMAS Hobart) they refer not to the most recent modifications but to the ship’s state in 1939.

N/A indicates data not available.

1. ‘Town’ Class

CLASS	BRISTOL (LIVERPOOL)	DARTMOUTH
LBP	430-0	430-0
LOA	453-0	453-0
BEAM	47-0	48-6
HULL DEPTH	26-7⅝	26-10½
FREEBOARD AMIDS	11-9	N/A
DRAFT
FWD	14-0⅝	N/A
AFT	16-3⅛	15-6 mean
MEAN DEEP	15-3	N/A
NORMAL	4,825	5,275
SHAFTS	4	4
SHP	21,500	22,000
SPEED NORMAL	25	25
COAL	1,353 capacity	1,290 capacity
OIL	256 capacity	269 capacity
ENDURANCE	5,830/10	5,610/10
COMPLEMENT	310	534 in 1922
WEIGHTS:
HULL	1,910 (2,104.3)	2,150.75
MACHINERY	1,115 (1,014.57)	1,057.58
ARMAMENT	225 (283.20)	309.59
EQUIPMENT	245 (327.50)	333.34
PROTECTION	420 (501.73)	481.93
FUEL	600 (570.0)	800
RFW	23.60	44.11
NORMAL	4,700 (4,825)	5,275
ARMAMENT: GUNS
6 IN	2 x 6in/50 (150)	8 x 6in/45 (150)
4 IN	10 (150)	N/A
MAXIM MG	4 (5,000)	4
TT	2 x 18in (7)	2 x 2in (7)
PROTECTION
BELT	N/A	N/A
DECK	2in – ¾in	2in – ¾in

LIVERPOOL and DARTMOUTH weights are from Vickers light cruiser book, recording actual weights.

NOTES: Chatham weights are from the Melbourne Cover. Birmingham weights as designed and as completed are from the Cover for Birkenhead and Chester. Lowestoft (Birmingham Class) IX data 18 Jun 1914: light ship 4,564 tons, deep load 6,228 tons.

2. ARETHUSA Class and Successors

CLASS	ARETHUSA (PENELOPE)	CAROLINE/CALLIOPE
LBP	410-0	420-0
LWL
LOA	436-0	446-0
BEAM	39-0	41-6 ext
HULL DEPTH	24-7 mld	24-7 mld
FREEBOARD
FWD	21-0	22-0
AMIDS	10-6	11-6
AFT	11-6	12-6
DRAFT
FWD	13-0	12-6
AFT	14-0	14-6
MEAN (DEEP)	15-7	15-6
NORMAL	3,512	3,750
SHAFTS
SHP	40,000	40,000
SPEED NORMAL	29.5	28.5
OIL	840 capacity	175
ENDURANCE	1,400/half-power	1,650/10 (1922)
COMPLEMENT	270	368 (1922)
WEIGHTS:
HULL	1,860 (1,606.08)	1,860
MACHINERY	875 (908.6)	875
ARMAMENT	198 (123.27)	232
AMMUNITION	(74)	N/A
EQUIPMENT	253 (245.43)	253
PROTECTION	333 (301.14)	333
FUEL	210(240)	175
RFW	21 (22.48)	22
NORMAL	3,750 (3,521)	3,750
ARMAMENT:
GUNS
6 IN	2 (150)	2 (150)
4 IN	8 (300)	8 (300)
MAXIM (MG)	1 (8,000)	1 (8,000)
TT	2 x II (10)	2 (7)
PROTECTION
BELT	3in	3in
DECK	1in	1in

NOTE: Weights for Arethusa and Caroline are Vickers Barrow detailed estimates for the 1914/15 cruisers. Weights in parentheses for Arethusa are actual weights of HMS Penelope (from Vickers file). Aurora IX 19 Oct 1914: light ship 3,196 tons, legend displacement 3,587 tons, deep load 4,204 tons. Caroline IX 26 Nov 1914: light ship 3,486.5 tons, deep load 4,630.95 tons, which the constructor involved considered very high in view of the design figures.

CLASS	CENTAUR
LBP	420-0
LOA	446-0
BEAM	42-0
FREEBOARD
FWD	22-0
AMIDS	11-6
AFT	12-6
DRAFT
FWD	12-6
AFT	14-6
MEAN DEEP	15-6
NORMAL	3,750
SHAFTS
SHP	40,000
SPEED NORMAL	30
OIL	900
ENDURANCE	1,500/half-power
COMPLEMENT	322
WEIGHTS:
HULL	1,800
MACHINERY	834
ARMAMENT	180
EQUIPMENT	221
PROTECTION	335
FUEL	300
BOARD MARGIN	20
NORMAL	3,750
ARMAMENT:
GUNS
6 IN	5 (150)
4 IN	N/A
3 PDR AA	2 (300)
MAXIM MG	1 (8,000)
TT	2
PROTECTION
BELT	3in
DECK	1in

NOTE: Centaur data are taken from d’Eyncourt Notebook in NMM.

CLASS	CALYPSO (CASSANDRA)	CERES (CURLEW)
LBP	425-0	425-0
LOA	450-0	450-0
BEAM	42-3 mld	43-0
HULL DEPTH	24-7 mld	24-7
DRAFT MEAN	14-43¾	14-5¼
DEEP MEAN	18-9	N/A
NORMAL	4,238	4,250
DEEP	4,910.85	4,939.3
SHAFTS	2	2
SHP	40,000	40,000
SPEED NORMAL	29	29
OIL	312 capacity	313
ENDURANCE	2,050/half-power	2,100/half-power
COMPLEMENT	438 (1922)	432 (1922)
WEIGHTS:
HULL	1,845 (2,659.51)	2,062.64
MACHINERY	848 (896.23)	897.19
ARMAMENT	243	217.68
EQUIPMENT	246	305.57
PROTECTION	320	313.93
FUEL	365	313
RFW	30 (28)	30
NORMAL	3,897 (4,238)	4,250
ARMAMENT:
GUNS
6 IN	5 (150)	5 (204)
3 IN	2 HA (300)	2 HA (252)
3 PDR AA	N/A	2 (2pdr)
MAXIM MG	1 (8,000)	1
TT	4 x II	4 x II
PROTECTION
BELT	3in	3in
DECK	1in	1in

NOTE: Cassandra designed weights are from Vickers data book on light cruisers, presumably are as built. Actual weights are from Vickers Weight Book No. 1. Curlew data are from Vickers Weight Book No. 1. In addition to oil, ships carried culinary coal, e.g. 15.65 tons in Curlew. Armament is from the Calypso class Covers (armament statement for Calypso). In 1918, the 3in rounds per gun aboard Ceres class cruisers were: 160 time-fused for HA, 40 night tracers (anti-Zeppelin), 100 anti-submarine (common), and 52 practice. At that time Rear Admiral Light Cruisers wanted to eliminate the anti-Zeppelin rounds and the practice rounds, adding 74 star shells. The weight saved would go into 6in rounds. Instead of the existing 113 CPC, 66 HE, 9 shrapnel, and 14 practice, he wanted 113 CPC and 99 HE.

Caledon and Colombo were converted into anti-aircraft cruisers, and in June 1944 they and Delhi were the only surviving operational ships of that type. Both were earmarked to receive Mk III barrage directors (the only other old cruisers so designated were the modernised Danae and Dragon).

CLASS	DANAE (DESPATCH)	EMERALD
LBP	445-0	535-0
LOA	472-6	570-0
BEAM	46-9	54-6
FREEBOARD
FWD	29-0	30-0
AMIDS	11-9	14-6
AFT	12-9	17-0
DRAFT
FWD	13-9	15-0
AFT	15-9	18-0
MEAN (DEEP)	16-11	18-6
NORMAL	4,970	7,550
SHAFTS	2	4
SHP	40,000	80,000
SPEED NORMAL	29	33
SPEED DEEP		About 32
OIL	1,065 capacity	1,600
ENDURANCE	2,300/half power
COMPLEMENT	27/427	34/560 (Enterprise)
WEIGHTS:
HULL	2,620	3,820
MACHINERY	1,030	1,590
ARMAMENT	320	355
EQUIPMENT	300	360
PROTECTION	400	700
FUEL	300	650
NORMAL	4,970	7,550
ARMAMENT:
GUNS
6 IN	6 (200)	7 (240/215)
4 IN HA	2 (130)	2 (200)
POMPOM	2 x I (800)	3 x I
MAXIM MG	2 (5,000)	1
TT	4 x III	4 x III
PROTECTION
BELT	3in	1in
DECK	1in (magazines)	1in

NOTES: Data for Despatch are from a Legend prepared in 1921 (ADM 1/9235). The enclosed 6in gun in Diomede added 15 tons to armament weight. ‘E’ Class data are from a Legend dated 9 May 1918 (ADM 1/9223). It indicates 240 rounds for each of the two foremost 6in guns, and 215 for each of the others.

NOTES: After Delhi was ordered rearmed with US 5in guns, alternative schemes of rearmament for other ‘D’ class cruisers were developed about April 1941: one with five twin 4in (500 rounds per gun), two quadruple pompoms (with directors), and four quadruple 0.5in machine guns; and one with four twin 4.5in guns. Four twin 4.5in plus two HA directors came to 130 tons, five US 5in plus two Mk 37 came to 113 tons, and five 4in twin plus two HA directors were 82 tons. Plans for radar modernisation of Delhi (Type 293 forward, Type 281B on the mainmast, Type 91 jammer) were developed about June 1944, but apparently never executed.

Initial details of the ‘D’ class modernisation, which ultimately applied only to Danae and to Dragon, were settled at a conference on 10 June 1942. Plans initially called for landing Nos. 3 and 4 6in guns (but apparently not the torpedo tubes) as well as the three single 4in HA guns. Danae would retain her original 6in director, but later ships might have new DCTs (none was converted in this form). The twin 4in mount would be hand-worked, controlled by a barrage director. The ships would all have two quadruple pompoms and four twin Oerlikons (P&S on the fore side of the bridge and aft). Planned radars were Type 290 on the foremast, Type 273M, two Type 282 for the pompoms, one Type 283 for the 4in gun (no fire-control radar for the 6in guns), a Type 251 beacon, and a Type 252 IFF transponder. One Duplex AV rangefinder would replace the bridge rangefinders. Compensation would include 50 tons of ballast. In fact one 6in gun (No. 3) and the torpedo tubes and 4in HA guns were landed. During a 28 April – 7 May 1944 refit Danae received missile-jamming equipment: two Type 650 masts and aerials, a US-supplied CXFR aerial on her mainmast (with transmitter in her Type 282 office), and Type 655. She also received countermeasures receivers, Types QD and QH3. In July 1944 an abortive study examined further improvement of the ship’s light anti-aircraft by removing another 6in gun and adding either a quadruple pompom or four twin Oerlikon Mk V at superstructure level, or four singles on the superstructure and two on the upper deck.

The Polish Navy wanted to modify Dragon; one Constructor’s Notebook contains a note from DNC to the ship’s new commanding officer (20 January 1943) reminding him that it had already been found necessary to fit the ship with 200 tons of ballast, and that more could not be added because freeboard was already a minimum. This answered a letter from a Captain Rymenowicz of the Polish Navy headquarters, which wished to replace No. 4 6in gun with a US-type twin Bofors, as that was the only suitable midships position. The Engineering Captain of the Polish Navy wanted to add more twin Oerlikons and, apparently, a second twin Bofors. These letters seem to have led to the decision to modernise Dragon to match Danae. As inclined in August 1943, Dragon had a twin 4in gun with a 4in barrage director aft. Her light battery amounted to five twin and four single Oerlikons: twins P&S on the superstructure abreast the bridge, P&S on pompom seats (until pompoms are available), one single P&S on the pompom director seats (until pompoms were fitted), singles P&S abreast the Type 273 radar on the superstructure level, and one twin Oerlikon on the quarterdeck with a blast screen. Two new diesel generators had been installed to carry the additional electrical load. Torpedo tubes had been landed. The ship had Type 291 radar and Type 86 short-range radio. The inclining experiment report does not indicate whether the 6in gun had been removed, but that must have been done to free the space for the pompoms. The report does indicate that Type 91 was planned, but not yet installed at this refit.

As inclined in September 1943, Dauntless had had her torpedo tubes removed, as well as her single Mk II* pompoms. She had eight single Oerlikons: P&S on the lower bridge, P&S forward of the fore funnel, P&S abaft No. 4 6in gun on the superstructure deck, and P&S on the quarterdeck. Single Oerlikons also replaced the after 4in HA gun and the two single pompoms. This was part way towards the planned upgrade. Radars were Types 271 and 291.

3. HAWKINS Class

CLASS	RALEIGH
LBP	565-0
LOA	605-0
BEAM	65-0
FREEBOARD
FWD	24-9
AMIDS	20-9
AFT	15-3
DRAFT
FWD	16-3
AFT	18-3
MEAN DEEP	19-3
NORMAL	9,750
SHAFTS	4
SHP	60,000
SPEED NORMAL	30
COAL	800
OIL	1,580
ENDURANCE	5,640/10
COMPLEMENT	37/672 (Frobisher)
WEIGHTS:
HULL	4,900
MACHINERY	1,950
ARMAMENT	560
EQUIPMENT	430
PROTECTION	810
FUEL	1,000
BOARD MARGIN 100
NORMAL	9,750
ARMAMENT:
GUNS
7.5 IN	7 (150)
12 PDR QF	6 (300)
12 PDR HA	4 (300)
TT	7
PROTECTION
BELT	3in

NOTE: A calculation of weights to go off when Frobisher was converted into a hulk (1947) to serve the HMS Defiance establishment gives her armament as a training ship: three 7.5in guns (forecastle deck forward, superstructure deck [on a platform], and upper deck aft), one 6in P.Mk IX (‘B’ position), one 4in HA Mk III (upper deck aft), five Oerlikons (four on the superstructure deck, one on the upper deck aft), and one quadruple Mk VIII torpedo tube.

4. ‘County’ Class

CLASS	KENT	LONDON
LBP	590-0	595-0
LOA	630-0	630-0
BEAM	68-4 ext	66-0
FREEBOARD
FWD	33-0	32-0
AMIDS	27-3	26-6
AFT	29-0	28-0
DRAFT
FWD	15-3	16-0
AFT	17-3	18-0
MEAN DEEP	20-6	21-3
STANDARD	10,000	9,840
SHAFTS	4	4
SHP	80,000	80,000
SPEED STD	31.5 light	32.25
SPEED DEEP	30.5	31.25
OIL	3,424	3,222
ENDURANCE		9,900/12
COMPLEMENT	50/736	48/745
WEIGHTS:
HULL	5,600	5,450 (5,190)
MACHINERY	1,830	1,826 (1,730)
ARMAMENT	1,000	1,004 (1,245)
EQUIPMENT	570	570 (640)
PROTECTION	1,000	960 (940)
STANDARD	10,000	9,840 (9,745)
FUEL	3,424	3,222
RFW	180	165
EQUIPMENT	100	100
ARMAMENT	106	111
DEEP LOAD	13,810	13,438
ARMAMENT:
GUNS
8 IN	4 x II (130)	4 x II (150)
4 IN	4 x I (200)	4 x I (100)
POMPOM	2 Mk M (1,000)	2 Mk M (1,000)
TT	2 x IV (9)	2 x IV (9)
PROTECTION
BELT	Magazines Only	1in
DECK	1⅜in	1⅜in

NOTES: Mk M pompom was the octuple; it was included in the design and in the Legend weights, but was not ready in time for installation. Some data are from the DNC history. Figures in parentheses for London are estimated weights based on material weighed as it was placed on board, from Day Constructor’s Notebook 4 (June 1928).

NOTES: Berwick: Plans for removal of ‘X’ turret (February 1944) envisaged adding two pairs of Mk VII (quadruple) pompoms, a Type 284 radar for the after 8in director, and modernising the ship’s other radars (installing Types 277 and 293). This was not done.

Cumberland: plans for removal of ‘X’ turret (January 1944) envisaged alternatives with and without installation of an AIC and Mk VI directors. The approved scheme (which was not carried out) did not include this additional improvement, but it did include radar modernisation (Types 277 and 293, and a second Type 284 for the after 8in director). This plan called for adding four more Mk VI octuple pompoms (total six) and five more twin Oerlikons (total ten), at the cost of one single Oerlikon (total reduced to nine). When the ship was under his command in August 1945, C-in-C East Indies proposed adding four single Bofors, presumably as part of the anti-Kamikaze programme: one each P&S on the former catapult deck in place of two single Oerlikons, and one each P&S on the quarterdeck abreast the Captain’s Hatch.

Kent: The proposed removal of ‘X’ turret (November 1943) was initially simply to add light anti-aircraft weapons, including four quadruple pompoms. However, schemes for installing an AIC were proposed in January 1944. Detailed lists of alterations (for the turret removal) were made in May 1944, including shortening her funnels (a feature not included in contemporary plans for Norfolk). Plans for the AIO were still being made that September, including ones to modernise the ship’s radar (including installation of Type 277). However, nothing was done, and late in 1944 plans were made to convert Kent into an accommodation ship. All of her 8in guns would be removed, and eight octuple pompoms mounted. Space would be added for 80 officers and 130 ratings, with a ward room and crews’ mess on the upper deck. Estimated light condition after conversion was 10,229 tons.

Suffolk: Early calculations for the refit to remove ‘X’ turret (which was never carried out) were dated January 1944; plans then included an AIC and Mk VI directors. At this time the ship had two octuple (MK VII) pompoms, five twin and four single Oerlikons (she had only three singles in April 1945). It appeared that she could be fitted with six quadruple pompoms, fourteen twin and four single Oerlikons. A more refined proposal (April 1945) called for four octuple pompoms (Mk VI) and eight twin and four single Oerlikons. However, at the same time plans were drafted to convert her for trooping, her hangar converted to house 150 men.

HMAS Australia: After being damaged at Lingayen Gulf, HMAS Australia was patched in Sydney and then sent to Devonport for refit. At Sydney her ‘X’ turret was landed (she was the only Kent class cruiser to have her ‘X’ turret removed). With the turret were landed two single Oerlikons on top and two single Bofors on the after controls. Her two cranes had been landed, boat derricks being installed. Her funnels had all been shortened by 5ft. As inclined in the UK in July 1945 the ship had two octuple pompoms (Mk VI), one abreast the after control on each side (but no pompom directors on board), one single Bofors on the centreline of her quarterdeck (with seatings for two more, which were not fitted), and eight single Oerlikons (P&S on the upper deck fore side of the forward superstructure, on sponsons P&S at the fore end of ‘B’ gun deck, P&S on ‘B’ turret, and P&S on the upper deck at the after end of the after superstructure). Both of her 8in directors carried US-supplied FC radars. She also had a Type 273 surface-search set, a two-aerial Type 281, a US-supplied SG surface-search set on her foremast, and Type 285 on her 4in directors. The British constructors offered two possibilities. One was to add four more Mk VI pompoms (total six). Her earlier nine single Bofors could be restored, and two of her four single Oerlikons landed (apparently the British initially confused single Oerlikons with single Bofors in her reports). However, this idea was soon superseded by plans to install a close-range battery of the original two pompoms plus three quadruple and two twin Bofors and four single Oerlikons. The ship would have a quadruple Bofors on her quarterdeck and two others abreast her bridge, and two twins in place of ‘X’ turret. A later proposal added four single Bofors (two abreast the catapult structure and two between the 4in guns). In addition, an AIO would be installed, and the ship’s radars modernised (fitting Types 277 and 281BQ and three barrage directors). Estimated light ship displacement was 10,639 tons.

NOTES: As rebuilt, London was given 3in armour over her side and her fan chambers. The planned reconstruction of Sussex, stopped by the outbreak of war, would have involved 4½in side armour and 3½in over her fan chambers.

Devonshire: In 1943 DG of AAW devised ‘ideal AA armaments’ for ships being refitted. For Devonshire he proposed, in June 1943, to reduce the 4in battery to two single star shell guns. She could then have four octuple and the two existing quadruple pompoms if she retained ‘X’ turret, or eight octuples if (as was done) ‘X’ turret was landed. The four-turret scheme also included eight twin and two single Oerlikons (sixteen twin and two single in the three-turret scheme). Instead, all the 4in guns were retained when ‘X’ turret was landed. The scheme adopted at this time also initially called for fifteen twin and no single Oerlikons (this was not the final scheme). Presumably the retention of the 4in guns was part of the reversal of the view that anything larger than a pompom was useless for anti-aircraft fire. All schemes included removal of the ship’s torpedo tubes. Existing quadruple 0.5in machine guns were removed at this time. A further rejected scheme envisaged replacing the 8in director tower with Oerlikons. It was rejected because it involved too much work, and because it added only one twin Oerlikon. Devonshire did have ‘X’ turret removed during a 1943–4 refit. Planned improvements included raising the 4in directors by 7ft. The ship’s close-range battery was somewhat reduced to compensate for fitting an admiral’s plot on the signal deck. As inclined in March 1944, Devonshire had had two diesel generators added on her main deck. Her two tactical rangefinders had been landed to save weight. She had six Mk VII (quadruple) pompoms (P&S on the superstructure abreast the forward boiler room vent, P&S on the superstructure abreast the after controls, and P&S in way of the former ‘X’ turret); twin Oerlikons P&S forward of the lower bridge, P&S raised 9ft 6in above the superstructure abreast the forward boiler room vent, P&S on the superstructure abreast the after end of the bridge, P&S raised 9ft 6in above the superstructure abreast the centre funnel, P&S between the 4in guns raised 9ft 9in above the deck, P&S on the upper deck on the fore side of the 27ft whalers, P&S in way of ‘X’ turret raised 6ft 9in above the superstructure, and on the quarterdeck; and singles P&S on ‘B’ and ‘Y’ turrets, P&S on the superstructure deck abreast the fore end of the bridge, P&S on the superstructure abreast the blacksmith shop, and P&S in the former barrage director positions aft. Pompom directors were P&S abreast the fore funnel over Type 282 offices, P&S on the after control, and P&S forward of ‘X’ turret position. The barrage directors were P&S on the lower bridge and on the centreline forward of ‘X’ turret position. Radars were Types 277, 293, 281B, 282, 283, 284 and 285. According to the IX report, Type 277 office structure but not the aerial had been fitted; the ship still had her Type 273 (which was to be removed before the refit was complete). The main mast carried FV1/Type 91, and there was a D/F coil on the fore side of the director platform. In October 1946, Devonshire was credited with one single Bofors, plus four quadruple pompoms, one twin power Oerlikon and one single Oerlikon. That may reflect the beginning of stripping for her training role (in April she had no Bofors, but fourteen twin power Oerlikons and four singles).

London: Also in 1943, the effect of removing ‘X’ turret from London was calculated as part of a larger modernisation including installation of an AIC (Ops Room, Radar Display Room, Aircraft Plot and Target Indication Room, and air-conditioning plant [3 tons]). and Mk 6 directors. ‘X’ turret would have been replaced by a quadruple pompom and two twin superimposed Oerlikons, plus a barrage director. Two more quadruple pompoms would have been added between the funnels. Additional Oerlikons would have been mounted. None of this was done, but the project was apparently revived in October 1944. By that time it included removal of the ship’s torpedo tubes. It still included the AIC, but apparently not the Mk 6 directors. This version envisaged installation of four octuple pompoms: two in place of ‘X’ turret and two abreast the after 8in DCT (the ship already had two such mounts, so she would emerge with six: forty-eight barrels). In place of her existing four twin and fourteen single Oerlikons, she would have five twins and two singles (singles would be removed from the quarterdeck, from the top of ‘X’ turret, from forward of the mainmast (P&S), from abreast the searchlight support (P&S), from abreast the fore funnel (P&S), and from the signal deck (P&S), and two twins would be removed from P&S of the main mast). Three twins would be added: P&S in way of the former ‘X’ turret and on the quarterdeck centreline (plans for six others were abandoned). Radars would have been modernised, including the addition of a Type 651 missile jammer (the ship already had the FV1/Type 91 combination). At about this time it was decided to install Type 274 on the forward director. Again, nothing was done. London never received an AIC. At the end of the war London had single Bofors atop her ‘B’ and ‘X’ turrets (and two other single mounts). By 1947 plans called for landing the two turret-top single Bofors, as well as other guns. Note that in December 1943 not fitting the planned AIC was expected to make it possible to add ten Oerlikons. In April 1946 London was credited with two octuple pompoms, four single Bofors, and eight twin Oerlikons (plus four single Oerlikons by October 1947). In April 1949 she was credited with four single and four single power Bofors (presumably Boffins replacing four twin power Oerlikons), plus four twin Oerlikons. Note that she had retained her torpedo tubes.

Shropshire: The ship was inclined (for the first time since 1929) to measure her stability after a refit prior to being transferred to the Royal Australian Navy. A memorandum dated 17 December 1942 on newly-ordered changes observed that that although the stability of Sussex and London had been accepted as a wartime measure, to enable essential fighting equipment to be installed, ‘it is appreciably less than would normally be accepted, and efforts are consequently being made to improve the stability of these two ships.’ For Shropshire, the largest improvement would be achieved by eliminating the aircraft and catapult, the next largest being shortening of each funnel by 6ft. However, the Australian Navy Board wanted to retain the catapult. Some, but hardly all, of the difference could be made up by landing the torpedo tubes. In the end, the aircraft and catapult had to be landed (the torpedo tubes remained). As inclined in June 1943, Shropshire had had her aircraft and catapult landed. She had two barrage directors abreast her bridge and two more aft, one per 8in turret. Her foremast carried Types 281 and 291 radars, an odd combination. She had a single Oerlikon on ‘B’ turret, twins P&S on the 4in deck level, two twins abreast her fore funnel, two twins on the centreline on the fore side of her Type 273 radar, singles P&S on the aft side of the pompoms, a single on ‘X’ turret, a twin on the quarterdeck (with a blast screen), and three single portable Oerlikons. She had Type 132 Asdic and the FV1 radar countermeasures system.

Sussex: In September 1943 the ship asked for more Oerlikons. DNC found enough weight to replace the ten singles on board with twins, but could not allow anything else. The main source of weight compensation was the aircraft and catapult, others including the two 12ft rangefinders on the bridge and the Type 273 ‘lantern’ (to be replaced by a Type 277 radar). In December, removal of ‘X’ turret was approved, freeing more space and weight. DNC prepared various alternative schemes in May 1944. The ship then had two octuple (Mk VI) pompoms. One possibility was to add four quadruple pompoms (Mk VII); in addition the ship would have thirteen twin and six single Oerlikons. Another was to use octuples in place of the four new quadruple mounts (total of six), with seven twin and no single Oerlikons. Yet another possibility was to add two octuple and two quadruple pompoms (total of four octuples), with thirteen twin and five single Oerlikons. In each case the torpedo tubes were landed as compensation. If the torpedo tubes were retained, the ship could have the six multiple pompoms and eleven twin and two single Oerlikons. The big refit included radar modernisation and addition of missile countermeasures (Type 651 and the US CXFR) plus Loran (fitted to many British cruisers late in 1944). On completion of her refit the ship was inclined (11 March 1945). Her ‘X’ turret and torpedo tubes had all been removed, and the petrol tank for her aircraft removed through her side. Light armament was six Mk VI (octuple) pompoms (RPC, with directors), four twin and six single Oerlikons. The pompoms were P&S abreast her fore funnel, abreast her main mast, and on her superstructure deck in way of ‘X’ turret position. Twin Oerlikons were P&S on the superstructure abreast the bridge and on the superstructure (on supports) abreast the centre funnel. The singles were P&S on ‘B’ turret, P&S on the lower bridge level on supports on the fore side of the bridge (they could be replaced by twins when available), and P&S on supports forward of ‘X’ gun position (they too could be replaced by twins when available). Radars were Types 281B (mainmast, with Type 941 interrogator above it), Type 277 (with Type 242 interrogator), Type 293 (with Type 242 interrogator), Type 251M beacon (on foremast, with equipment in Type 293 office), and Type 243Q on the cross-trees. Countermeasures were Type 91 on the mainmast and CXFR (in Type 91 office). The list did not mention the Type 651 missile jammer. The ship had a D/F coil on the fore side of the bridge, and a Y (radio intercept) office in the bridge at ‘B’ gun deck level. Note that Sussex retained her torpedo tubes.

CLASS	NORFOLK	NORTHUMBERLAND
LBP	595-0	570-0
LOA	633-0	600-0
BEAM	66-0	64-0
FREEBOARD
FWD	32-3	30-6
AMIDS	26-6	24-0
AFT	28-3	17-6
DRAFT
FWD	16-0	17-0
AFT	18-0	19-0
MEAN DEEP	21-0	21-6
STANDARD		9,975
SHAFTS	4	4
SHP	80,000	60,000
SPEED STD	32.25	30
SPEED DEEP	31.25	29
OIL	N/A	2,200
ENDURANCE	9,300/16	N/A
COMPLEMENT	57/672 (Dorsetshire)	N/A
WEIGHTS:
HULL	N/A	4,700
MACHINERY	N/A	1,435
ARMAMENT	N/A	1,200
EQUIPMENT	N/A	625
PROTECTION	N/A	1,900
MARGIN	N/A	125
STANDARD	10,000	10,000
FUEL	N/A	2,450
RFW	N/A	146
MACHINERY	N/A	–
EQUIPMENT	N/A	80
ARMAMENT	N/A	128
DEEP	N/A	12,664
ARMAMENT:
GUNS
8 IN	4 x II (150)	4 x II (100)
4 IN	4 x I (200)	4 x I (200)
POMPOM	2 Mk M (1,000)	2 Mk M (1,000)
TT	2 x IV (9)	2 x IV (9)
PROTECTION
BELT	1in (machinery)	5½in on ½in
DECK	1⅜in	2¾in on ½in

Because Norfolk was a modified London, no Legend was drawn up for Board approval. Data are given here for comparison with the abortive Northumberland, the 1928 ‘A’ Cruiser.

Removal of ‘X’ turret was approved in January 1944. At this time the ship had two Mk VI pompoms (octuple), no twin Oerlikons, and thirteen singles (one atop ‘B’ turret, two atop ‘X’ turret, singles P&S of the fore funnel, two P&S of the after funnel, a single to port abreast the crane, P&S aft near the Type 273 radar, and one on the quarterdeck). Plans included installing AIC. Alternatives were to replace the ship’s Mk VI pompoms with RPC Mk VIIs, four more being added (P&S abreast the middle funnel and aft in way of ‘X’ turret); or to retain the Mk VIs and add the four Mk VIIs, which was favoured. In that case the ship could also have seven twin and two single Oerlikons or, differently arranged, eleven twins and four singles. If no AIC were installed, the ship could gain six Oerlikons (two in the bridge structure, two twins forward of the fore funnel, one twin on the catapult platform to port, and one twin on the upper deck aft, to starboard). In November 1945 further radar modernisation (Type 281BQ instead of Type 281B, Type 277P instead of Type 277, Type 293P instead of Type 293) and the addition of ten single Bofors was proposed, the cost being eleven twin and nine single Oerlikons. In April 1946 Norfolk was credited with six quadruple pompoms, nine single Bofors, and eleven twin Oerlikons. She had the full AIC. Norfolk apparently retained her torpedo tubes, but they were gone by October 1947.

CLASS	YORK	EXETER
LBP	540-0	540-0
LOA	575-0	575-0
BEAM	57-0	58-0
FREEBOARD
FWD	30-6	29-9
AMIDS	15-0	15-0
AFT	17-6	16-9
DRAFT
FWD	16-0	16-0
AFT	18-0	18-0
MEAN(DEEP)	20-6	20-4
STD	8,418	8,621
SHAFTS	4	4
SHP	80,000	80,000
SPEED STD	32.25	32.25
SPEED DEEP	31.25	31.5
OIL	1,900	1,923
ENDURANCE	N/A	7,850/12
COMPLEMENT	43/589	44/480
WEIGHTS:
HULL	4,954	4,338
MACHINERY	1,755	1,770
ARMAMENT	901	990
EQUIPMENT	491	523
PROTECTION	1,017	1,020
STANDARD	8,418	8,621
FUEL	1,969	1,923
RFW	165	165
EQUIPMENT	64	56
ARMAMENT	33	33
DEEP	10,649	10,798
ARMAMENT:
GUNS
8 IN	3 x II (150)	3 x II (150)
4 IN	4 x I (200)	4 x I (200)
POMPOM	2 x octuple (1,600)	2 x octuple (1,500)
TT	2 x III	2 x III
PROTECTION
BELT	3in	3in
DECK	1½in	1½in

NOTE: York weights are as finally designed. Exeter weights are from the official DNC history (table on page 118). These are not the ones in the approved Legend, dated 25 February 1928, subsequently considerably revised. Neither ship was completed with the planned octuple pompoms.

Exeter IX is after her post-River Plate major repair.

5. LEANDER Class

CLASS	LEANDER
LBP	522-0
LOA	554-3
BEAM	55-2
FREEBOARD
FWD	29-10
AMIDS	15-4
AFT	17-10
DRAFT
FWD	15-2
AFT	17-2
MEAN DEEP	19-11
STANDARD	7,448
DEEP	9,452
SHAFTS	4
SHP	72,000
SPEED STD	32.5
SPEED DEEP	31
OIL	1,745
ENDURANCE	8,000/12
COMPLEMENT	42/550 (later ships 46/562)
WEIGHTS:
HULL	3,875
MACHINERY	1,504
ARMAMENT	731
EQUIPMENT	507
PROTECTION	871
STANDARD
FUEL	1,785
RFW	134
EQUIPMENT	63
ARMAMENT	22
DEEP	9,452
ARMAMENT:
GUNS
6 IN	4 x II (200)
4 IN	4 x I (200)
0.5 IN MG	3 x IV (2,500)
TT	2 x IV
PROTECTION
BELT	3in on 1in
DECK	1¼in

Note that Achilles light GM was 2.74ft in 1933, but only 1.62ft in 1944.

Achilles was modernised in 1943–4, her single 4in guns finally replaced by twins (with two sided HADT instead of the earlier centreline one), and four pompoms installed. ‘X’ turret was landed. She emerged with five twin and six single Oerlikons and modern radars. Hence the May 1944 IX. Fitting of Type 651 missile jammers was approved in September 1944; two 36in searchlights were removed from abreast the funnel as compensation. In September 1945 Achilles reported that during a refit in March–April 1945, while part of the British Pacific Fleet, she had landed her torpedo tubes and added five Bofors Mk III (single hand-worked US guns). The single Oerlikons P&S on the superstructure abreast the bridge were moved to the 4in blast screens, and their position extended to take two single Bofors on each side abreast the bridge (the fifth was on the quarterdeck). The torpedo parting space was temporarily converted to a mess deck for the additional complement required by the increased armament and by radar personnel. Apparently this action had not been vetted by DNC. DNC replied that the Bofors had to be surrendered when the torpedo tubes were restored. However, Achilles was an RNZN ship, and in March 1946 the New Zealand Navy Board proposed to compensate for the restored torpedo tubes by removing only one Bofors and two twin Oerlikons from the forecastle. The issue became moot when the ship was returned to the Royal Navy in exchange for a new Dido. As inclined in May 1944, Achilles had had her torpedo tubes and ‘X’ turret landed. She had four Mk VII pompoms (P&S abreast the empty catapult position, and P&S in way of ‘X’ turret); twin Oerlikons P&S on the forecastle abreast her bridge, P&S on the catapult platform, and P&S on the roof of the officers’ galley, and on ‘Y’ turret; and singles P&S on ‘B’ gun deck and on the quarterdeck. Two 4in HADT had replaced the former single one. Barrage directors had been fitted on the centreline on ‘B’ gun deck abaft ‘B’ turret and on the centreline aft between the after pair of pompom directors over the look-out position. Radars were Types 276, 293 and 281B, plus gunnery sets. She also had FV1/Type 91, a US-type TBS radio, and British Types 86 and 87. A fighter control plotting office, radio telephone office, and chart house had been built on the lower bridge, and the roof on the upper bridge had been removed. In April 1946 Achilles, on loan to the RNZN, was credited with the five single Bofors, plus seven twin and four single Oerlikons – and her torpedo tubes.

Ajax: The British Admiralty Delegation in Washington requested approval of the planned rearmament on 25 March 1943. Pompoms would be replaced by two US-type quadruple Bofors. DNC approved fitting four twin and one single Oerlikons, working from that point to a total of three quadruple Bofors, eleven twin and two single Oerlikons. That involved removing the single Oerlikon on the after controls as well as the two quadruple pompoms (replaced by Bofors). A third quad would be mounted abaft the funnel. Oerlikon positions were: two twins on the quarterdeck, twins on ‘B’ and ‘X’ turrets, a twin on the after controls, two singles on the upper deck, a twin either side abreast the catapult platform, and two twins on the superstructure deck forward. Boats, cranes and torpedo tubes would have been removed as compensation. In July 1945 it was approved to fit two RPC quad pompoms in place of the Bofors, together with British directors.

Leander was modernised in the United States, her ‘X’ turret landed. Like the others, she received sided 4in directors instead of the earlier centreline HADT. Catapults, rangefinders, and quadruple 0.5in machine guns were all removed. She was expected to emerge with two quadruple pompoms, six twin Oerlikons, three barrage directors, and modernised radars (including Types 277, 293 and 281B, and the Type 91 jammer). Compensation items were her torpedo tubes and wood from her upper deck forward of her torpedo tubes. In March 1945 it was proposed to replace two twin Oerlikons Mk V with single power 2pdrs (Mk XVI), offering a net saving of 3.5 tons and heavier anti-aircraft projectiles. However, as plans evolved, she was expected to receive US-type quadruple Bofors. They apparently were not on board when she returned to the United Kingdom, to the point where in November 1945 it was proposed that twin Bofors be fitted instead. When the ship was inclined in July 1946, she had on board twin Bofors P&S abreast her after controls (with directors), plus a single Bofors P&S on ‘X’ gun deck and a single Bofors on a pedestal on the centreline of that deck, plus twin Oerlikons P&S on the forecastle deck abreast the bridge, and twin Oerlikons P&S abreast the after control. The ship had barrage directors on the fore side of the bridge and on the after superstructure over the control position. Radars were Types 277, 276 (on the foremast), and 79B, with Type 91/FV1 on the mainmast, plus the usual gunnery types (282, 283, 274 and 285). Aerials for the short-range Types 85M and 87 radios were on the W/T yard of the mainmast. Note that in October 1945 the official ship data list (CB 1815) ascribed two quadruple Bofors and three twin power and four single Oerlikons to Leander. A year later she was credited with the battery listed above.

5. Modified LEANDER Class/SYDNEY Class

NOTE: Legend data from Legend dated 27 October 1932 for 1932 Programme cruiser and from slightly later calculations for the Board. Armament includes 55 tons for seaplane, catapult and crane. Machinery weight is 1,310 tons of E-in-C weight plus 90 tons of refrigerating machinery, dynamo, and engineers’ lubricating oil.

CLASS	SYDNEY
LBP	530-0
LOA	562-0
BEAM	56-8
FREEBOARD
FWD	29-9
AMIDS	15-8
AFT	17-2
DRAFT
FWD	15-3
AFT	17-3
AT DEEP: MEAN	19-5
STANDARD	7,197
DEEP	9,330
SHAFTS	4
SHP	72,000
SPEED STD	32.5
SPEED DEEP	31
OIL	1,837
ENDURANCE	7,000/16
COMPLEMENT	46/586
WEIGHTS:
HULL	3,679
MACHINERY	1,393
ARMAMENT	746
EQUIPMENT	473
PROTECTION	906
STANDARD	7,197
FUEL	1,837
RFW	148
EQUIPMENT	73
ARMAMENT	23
DEEP	9,278
ARMAMENT:
GUNS
6 IN	4 x II (200)
4 IN	4 x I (200)
0.5 IN MG	4 x IV (2,500)
TT	2 x IV
PROTECTION
BELT	4in (machinery)
DECK	2in (magazines)

NOTE: Sydney data from DNC official history, table on page 118 of various cruisers. Initial additions to all three ships included about 35 tons of protective plating. As inclined at Garden Island in November 1941, Perth displaced 7,209 tons light (7,080 tons in 1939) and 9,763 tons deep; GM was reduced from 2.2ft to 1.08ft. She was assigned 175 tons of permanent ballast, but shipped only 18 tons before being sunk. Hobart did ship the 175 tons (early 1942, estimated deep load 9,908 tons). As modernised Hobart displaced 9,420 tons (deep). This is official RAN information, not from RN Constructors’ Notebooks.

7. ARETHUSA Class

CLASS	ARETHUSA
LBP	480-0
LOA	506-0
BEAM	51-0
FREEBOARD
FWD	27-9
AMIDS	14-3
AFT	15-3
DRAFT
FWD	13-3
AFT	15-3
MEAN DEEP	17-10
STANDARD	5,419
DEEP	6,896
SHAFTS	4
SHP	64,000
SPEED STD	32.25
SPEED DEEP	30.75
OIL	1,127
ENDURANCE	6,500/16
COMPLEMENT	500
WEIGHTS:
HULL	2,581
MACHINERY	1,221
ARMAMENT	563
EQUIPMENT	493
PROTECTION	633
STANDARD
FUEL	1,327
RFW	116
EQUIPMENT	16
ARMAMENT	18
DEEP	6,896
ARMAMENT:
GUNS
6 IN	3 x II (200)
4 IN	4 x I (150)
0.5 IN MG	2 x IV (2,500)
TT	2 x III
PROTECTION
BELT	2¼in
DECK	1in

8. SOUTHAMPTON Class

NOTE: Second series of figures for Belfast are as deduced from inclining experiment, according to a comparative table of cruiser data in Wood Constructor’s Notebook 6 dated 25 March 1947.

NOTES: Comparative displacements of Southampton and Gloucester classes:

The proposal to modernise the anti-aircraft armament of Liverpool (September 1943) called for much the same work as on Birmingham, but with US quadruple Bofors guns in place of both ‘X’ turret (two quads) and the pompoms atop the hangar roof.

9. DIDO Class

CLASS	DIDO	BELLONA
LBP	485-0	485-0
LWL	N/A	506-0
LOA	512-0	512-0
BEAM	50-6	50-6
FREEBOARD
FWD	24-1	27-6
AMIDS	11-5	13-6
AFT	12-7	14-1
DRAFT
FWD	12-11	13-3
AFT	13-6	16-2
MEAN DEEP	16-10	N/A
STANDARD	5,450 (5,521)	5,770
SHAFTS	4	4
SHP	62,000	62,000
SPEED STD	32.25	32
SPEED DEEP	30.75	30.5
OIL	1,105	1,110
ENDURANCE	5,500/16	5,500/16
COMPLEMENT	487	508
WEIGHTS:
HULL	2,521	2,645
MACHINERY	1,146	1,165
ARMAMENT	730	670
EQUIPMENT	406	430
PROTECTION	718	860
STANDARD	5,521	5,770
FUEL	1,105	1,110
RFW	99	N/A
MACHINERY	23	N/A
EQUIPMENT	39	N/A
ARMAMENT	49	N/A
DEEP	6,836	N/A
ARMAMENT:
GUNS
5.25 IN	5 x II (360)	4 x II (340)
4 IN	N/A	1 x I star shell (150)
POMPOM	2 x IV (1,800)	2 x IV (1,800)
0.5 IN MG	2 x IV (2,500)	2 x IV (2,500)
TT	2 x III	2 x III
PROTECTION
BELT	3in	3in
DECK	1in	1in

NOTE: Bellona data are from a Legend dated 31 August 1940.

10. FIJI (‘Colony’) Class

Weights in parentheses are for the ship as built (weighted by weight group).

CLASS	FIJI	UGANDA
LBP	538-0	538-0
LWL	550-0	550-0
LOA	555-6	555-6
BEAM	62-0	62-0
FREEBOARD
FWD	30-0	29-6
AMIDS	15-6	15-0
AFT	17-6	17-0
DRAFT
FWD	15-6	16-0
AFT	17-6	18-0
MEAN DEEP	N/A	20-0
STANDARD	8,253 (8,630)	8,640
SHAFTS	4	4
SHP	80,000	80,000
SPEED STD	32.25	32.25
SPEED DEEP	31.25	31.25
OIL	1,700	1,700
ENDURANCE	8,000/16	8,000/16
COMPLEMENT	738 (Flag)	754 (Squadron Flag)
WEIGHTS:
HULL	3,819 (4,130)	4,190
MACHINERY	1,450 (1,430)	1,450
ARMAMENT	1,190 (1,220)	1,130
EQUIPMENT	550 (550)	550
PROTECTION	1,289 (1,300)	1,410
STANDARD	8,253 (8,630)	8,640
FUEL	1,700 (1,700)	1,700
RFW	128 (128)	N/A
MACHINERY	8 (0)	N/A
EQUIPMENT	93 (93)	N/A
ARMAMENT	172 (169)	N/A
DEEP:	10,354 (10,720)	N/A
ARMAMENT
GUNS
6 IN	4 x III (150)	3 x III (150)
4 IN	4 x II (150)	6 x II (150)
POMPOM	2 x IV (1,200)	2 x IV (1,200)
0.5 IN MG	2 x IV (2,500)	2 x IV (2,500)
TT	Space reserved
PROTECTION
BELT	3½in	3½in
DECK	2in	2in

NOTE: Fiji draft and freeboard are from an 11 October 1937 Legend for a standard displacement of 8,170 tons, later increased. Fuel capacity and deep load for speed exclude reserve fuel. SHP is for temperate climates. In tropics, shp is reduced to 72,500 and speeds to 31.5kts and 30.5kts, respectively. Uganda data are from a Legend for a Modified Fiji dated August 1940, not for the completed ship. Notes show stowage for 200 rounds per 6in, 250 per 4in, and 1,800 per 2pdr, but not at the Legend displacement. In Uganda, armament weight includes 160 tons for aircraft equipment.

In April 1946, Ceylon had four single Bofors and Newfoundland had one quadruple Bofors mount. Both had three quadruple pompoms and five (Newfoundland six) twin power Oerlikons, plus two singles. Presumably the Bofors were Pacific War additions (but both ships retained their torpedo tubes).

For the 1950–2 large repair of Newfoundland, the approved light armament was two twin and one single Bofors on each side atop the hangar, one twin Bofors on the centreline amidships, and two twin Bofors P&S at the after end of the forecastle deck. All had external directors: two STD forward, one amidships and two aft. This battery was adopted in favour of one including the self-contained STAAG mounting (and retaining the existing Mk 4 directors for the 4in guns). The net saving on the close-range battery was 41 tons, but the adoption of two Mk 6 directors in place of the earlier three Mk 4s cost a net 13 tons. Estimated displacement, to be compared to the 1952 data above: light ship 8,957 tons, half-oil 10,314 tons, and deep 11,160 tons.

11. Improved FIJI Classes

Weights in parentheses are deduced from inclining experiment data.

NOTE: Tiger figures are from September 1954 estimates (ADM 1/25800); information in the Cover is not complete enough to provide later hence more accurate figures. The twin 40mm and the torpedo tubes were never fitted.

12. Wartime Designs

CLASS	1940 Cruiser	1941 Cruiser
LWL	720-0	690-0
BEAM	84-0	82-0
DRAFT MEAN	24-0	21-0
HULL DEPTH	N/A	45-0
STANDARD	21,500	18,740
SHAFTS	4	4
SHP	160,000	120,000
SPEED STD	33.5	31.5
SPEED DEEP	32.25	30.5 clean
OIL	2,900
ENDURANCE	9,000/16	6,000/24
WEIGHTS:
HULL	9,200	8,100
MACHINERY	5,100	2,350
ARMAMENT	2,560	2,540 (170 Aircraft)
EQUIPMENT	9,10	740
PROTECTION	5,730	4,660
BOARD MARGIN		350
STANDARD	21,500	18,740
ARMAMENT
GUNS
8 IN	12 x III (200) OR	3 x III (200)
	3 x III 9.2in (200)
4.5 IN	6 x II HA/LA (400)	N/A
4 IN	–	8 x II (250 HA, 100 LA)
POMPOM	2 x VIII	5 x VIII (1,800)
0.5 IN MG	2 x IV	Max 20MM
PROTECTION
BELT	7in	4½in (machinery)
DECK	2¾in (machinery)	2in

NOTE: No Legend was produced for the 1941 cruiser. Weights were taken from W G John Constructor’s Notebook 13; they represent the design as in March 1942, when it died. Some figures reflect Staff Requirements circulated in November 1941. Dimensions are mainly from requests for horsepower passed to the model basin. Through 1941 overall length was 670ft (656ft between perpendiculars) and beam was 80ft. Initially the secondary battery was four twin 4.5in, but the late version of the design showed the eight twin 4in above. Data are uncertain because the design kept evolving. W G John was in charge of cruiser design at the time. Data on the 1940 design are from a comparative table circulated in 1940, in the Cover.

CLASS	CRUISER 1944: DESIGN N.2	DESIGN M.1
LBP
LWL	550-0	520-0
LOA
BEAM	64-0	55-0
FREEBOARD
FWD	29-3	26-9
AMIDS	15-3	12-9
AFT	17-3	14-3
DRAFT
FWD	15-9	15-3
AFT	17-9	17-3
MEAN DEEP	20-6	19-6
STANDARD	8,650	7,150
SHAFTS	4	4
SHP	48,000	44,000
SPEED STD	29	29
SPEED DEEP	28	28
OIL	2,300	1,700
ENDURANCE	7,700/18 home waters 6 out	6,200/18
COMPLEMENT	ca. 675 (Flag)	ca. 600 (Flag)
WEIGHTS:
HULL	4,850	3,925
MACHINERY	1,040	1,000
ARMAMENT	970	745
EQUIPMENT	530	490
PROTECTION	1,090	830
STANDARD	8,650	7,130
ARMAMENT
GUNS
5.25 IN	4 x II (400)	3 x II (400)
BUSTERS (TWIN 40)	8 (1,440)	6 (1,440)
20MM (POWER)	12 x II (2,400)	8 x II (2,400)
TT	2 x IV (9)	2 x IV (9)
PROTECTION
BELT	3in	3in
DECK	2in	2in

NOTE: Data are from an undated Legend in Pt 3 of the 1943 papers of the First Sea Lord (ADM 205/29). Recalling his unhappy experience when the 1914 Arethusa failed to make her required speed, DNC doubted that these slow cruisers would be successful.

CLASS	NEPTUNE	MINOTAUR
LWL	655-0	645-0
BEAM	76-0	75-0
FREEBOARD
FWD	32-6
AMIDS	23-0
AFT	17-9
DRAFT
FWD	21-0
AFT	21-0
MEAN DEEP	24-6
STANDARD	15,350	15,280
SHAFTS	4	4
SHP	108,000	100,000
SPEED STD	32	31.5
SPEED DEEP	29.5	–
OIL	2,850	2,100
ENDURANCE	7,500/20 Clean	6,000/20
COMPLEMENT	1,050
WEIGHTS:
HULL	7,850	7,240
MACHINERY	2,000	2,100
ARMAMENT	2,050	2,270
EQUIPMENT	810	1,060
PROTECTION	2,340	2,480
BOARD MARGIN	300	3,05
STANDARD	15,350	15,280
FUEL	2,850	2,100
RFW	N/A	180
DEEP:	N/A	18,415
ARMAMENT
GUNS
6 IN	4 x III (250)	5 x II
10.5 IN	6 x II (400)	–
3 IN	–	8 x II
BUSTER	10 (twins) (1,440)	–
20 MM	16 x II (2,400)	–
TT	4 x IV (17)	4 x IV (17)
PROTECTION
BELT	4½in
DECK	2in

Data on Minotaur are from a comparative table dated August 1947, which also showed Designs ZA and ZB and USS Worcester. The design was not completely worked out, so when a new cruiser design was begun in 1950 it used data compiled for the Neptune design.

13. The Missile Cruiser

CLASS	GW 96A
LWL	675
LOA	687
BEAM	80
DRAFT MEAN DEEP	22-0
STANDARD	15,762
SHAFTS	4
SHP	110,000
SPEED STD	–
SPEED DEEP	31 (32 deep and clean)
OIL	2,450
ENDURANCE	4,500/20
COMPLEMENT	95/1,020
WEIGHTS:
HULL	9,050
MACHINERY	2,258
ARMAMENT	1,898
EQUIPMENT	1,218
PROTECTION	1,244
STANDARD	15,762
FUEL	2,450
RFW	104
BOARD MARGIN	198
DEEP:	18,420 (changed to 18,450)
ARMAMENT
SEASLUG	64
GUNS
6 IN	2 x II (420, including 20 starshell)
3 IN	4 x II (900)
PROTECTION
BELT	1½in (machinery)
DECK	1in

NOTE: Details have been taken from Mansbridge Constructor’s Notebook 7 (which gives weights) and from the Cover. This was the final design before cancellation, presumably the one which would have been built. The armament group includes radars.

14. Fast Minelayers

Abdiel data from Legend dated 18 November 1938.

CLASS	ADVENTURE	ABDIEL
LBP	495-0	400-0
LWL		410-0
LOA	516-0	417-11
BEAM	58-0	39-0 (40-0 as built)
FREEBOARD
FWD	30-3	24-0
AMIDS	18-11	18-0
AFT	19-11	19-3
DRAFT (STANDARD)
FWD	14-0	10-0
AFT	16-0	12-0
DRAFT (DEEP)
MEAN	17-6	13-8
STANDARD	6,850 (Legend)	2,650
SHAFTS		2
SHP	40,000	72,000
SPEED STD	28 (Legend)	39.75 (later given as 40.2)
SPEED DEEP		About 36 (later given as 35.2)
OIL	1,500 capacity	700
ENDURANCE	5,500/15
COMPLEMENT		240 (est)
WEIGHTS:
HULL	4,300	1,270 (1,324)
MACHINERY	1,200	950 (928)
ARMAMENT	140	130 (139)
MINES/MINING EQT	320	215 (257)
EQUIPMENT	320	100 (200)
PROTECTION	–	5
STANDARD		2,650
FUEL	500	749
RFW	N/A	46
EQUIPMENT	N/A	N/A
ARMAMENT	N/A	N/A
DEEP	6,850	3,643
ARMAMENT:
GUNS
4.7 IN HA	4 (200)	N/A
4 IN	–	3 x II (250)
POMPOM	1 x VIII (1,800)	1 x IV (1,800)
0.5 IN MG	–	2 x IV (2,500)
MINES	300	100 Mk XIV
		(150 emergency)

NOTES: Adventure weights and dimensions are from a Legend dated March 1921 (ADM 1/9228); unfortunately the Cover is missing. This version included the diesel engine but also included the planned (but not fitted) octuple pompom. Displacement given is the Legend or Navy List figure, since this Legend was constructed before the Washington Treaty. Load displacement includes a 70-ton Board Margin. As IX September 1940, she displaced 6,650 tons standard (mean draft 13ft 10¾in). The major items fitted since that time were SA gear (to protect against acoustic mines), Asdic, radar (Types 251, 271 and 286PQ [likely to be replaced by 79BM]), a D/F office on the signal deck, and protection to vital internal communications. New approved additions as of 18 March 1943 included twin Oerlikons Mk V (three on each side), RPC for the multiple pompoms, Asdic 128T, and an aircraft plotting office. A proposed rearmament (July 1943) envisaged replacing No. 4 single 4.7in gun with a quadruple RPC pompom. Another proposal called for replacement of each single 4.7in gun by a twin 4in. A proposal in August 1943 showed three upper deck 4.5in mountings, all forward. Another proposal was to add two quadruple pompoms and to replace the octuple mount aft with a third.

Abdiel data are from a Legend dated 1938. The figures in parentheses are from the DNC history, and are probably final design data. IX data for Ariadne, a repeat Abdiel: hull 1,475.42 tons, machinery 919.34 tons, armament 123.93 tons (141.96 tons in deep condition), equipment 123.40 tons (195.42 tons in deep condition), and mines etc 155.43 tons (234.63 tons in deep condition). As inclined on completion, standard displacement was 2,805.62 tons and full load was 2,963.23 tons. Brinton 5/6 Constructor’s Notebooks include details of alternative designs for a new fast minelayer (1943). Design A would have displaced 3,572 tons standard (5,026 tons deep). Design ‘B’ (August 1943) would have displaced 3,458 tons standard and 4,901 tons deep, with two twin 4.5in between-decks Mk IV HA/LA (400 rounds/gun), four Buster (two centreline, two sided), eight twin Oerlikons (one at each end on centreline, three each side). Design C sacrificed power by adopting unit machinery (54,000 shp, with the same hull form and the same armament: 410ft x 44ft x 29ft x 11.5ft std/15.1ft deep). In August 1943 there was a further armament study (three upper deck twin 4.5in instead of two between-decks mounts, with two forward and one aft in place of the two after Bofors and the quarterdeck Oerlikon atop the after crew shelter). Owing to the height of ‘B’ gun, the bridge had to be raised. Another alternative was to add short rails aft for thirty more mines. These studies continued into November 1943.