SH3 Commander question

[Observer]

Originally Posted by Beery

But the Obersteuermann is not just a navigator. He also takes the third watch, looks after the boat's provisions, arranges the meal plan with the cook and (like the COB) is the senior NCO on the boat.

Any comparison falls apart if viewed too closely, but I find comparisons are helpful.

With the exception of the making the watchbill (COBs job on an SSN), and provisions (Chop and MSC) the Nav is also an OOD in charge of a watch section (Eng and Weps as well, except on my boat at least), so from the watch standing perspective the Obersteuermann is like the Nav.