Alright, I'll relent and ask something on, like, German stuff next. Give me a few hours to dig up something good though.
The answers are:

Mk 37: 7 men. Range taker, rangefinder operator, illumination control officer (radar), talker, control officer, pointer and, trainer.

The gun mount was the infamous 40mm twin Bofors 'Hazemeyer' (aka the "Hasslemeer" as its maintenance men typically called it....eg "Auch, I see tha Hasslemeer she be eel again!"). This was developed into the STAAG (Stabilized Tachymetric Anti-Aircraft Gun) on the British Battle class destroyers. 17 tons to get two 40mm guns in action....This mount was often refered to derisively as the "Antlered beast" for its propensity to break down and the maintenance it required.
The Hazemeyer was developed in the Netherlands in 1939 - 40 by Dutch Philips company scientists von Weller and Staal who smuggled out the prototype and plans on 14 May during the invasion of Holland in 1940. A working example was on the HNMS Isaac Sweers at the time.