This system was removed from my new 212A model and features a video camera, transmitter, and LCD5802D monitor with sunshield. 
 
The unit has been tested and is fully functional. Camera type and specs are unknown. Both the camera and transmitter module have been layered with RTV rubber for waterproofing. The transmitter leads are currently bare, requiring 12V power for operation. 

A great chance to tick the box for your RC submarine's feature list!