von Zelda

<in this model, the Conning Tower is the radio room. not historically correct. some mega-mods correct this by adding a radio room. not to worry, just make the mental adjustment and treat the conning tower as the radio room.>

There's a 6 man position Conning Tower (Radio Room) on the Crew Management page made up as 3 shifts of 2 men. The 1st position is radar and the 2nd position is sonar for each shift. For what it might be worth to know, if you remove a man while on duty, his radar or sonar figure in the conning tower will be vacant.

Also, there's a mod that allows for more officers and petty officers. It is Crew Rank Fix - Stock - Mod
It should be in the download section.

I try to pick all basic seamen with 100 pts as watchmen, mechanical & electrical. All seamen with less get tossed.