* The heat transfer calculations were performed assuming a lumped coefficient for the air and metal hull. The details (for my fellow nerds) were: K=0.027 W/m*K for moist air, K=59 W/m*K for wrought iron. Use of h=50 was mathematically determined by the relationship between Nu and Re. For turbulent flows, Nu can be expected to be ~1,000, which leads to a calculation of h=45 for λ=0.027 and L=0.6 m. However, it could be argued that the men in the hull are more comparable to turbulent flow inside a pipe, which would justify a much higher h-value and therefore calculate colder temperatures.