i dont think the weight of the crew is accounted for in SH3... im going to go with NO.
if you want to try this out put all of your crew in forward compartments... whil;e sitting on the surface stopped.
Order a crash dive and start your clock, when the last part of the boat is submerged stop the clock.
now repeat the process with the crew spread about all over the boat and see if you notice any change of more than 4 or 5 seconds.
i doubt you will notice a difference
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