Just a little side note about the radar that I realized the other day when tinkering around:
Above the A-Scope is a bearing indicator, but it isn't really seen with stock camera values. This dial shows the relative bearing as well as the true bearing, but the true bearing part only works sometimes for me, probably for the same reason that the compass in the conning tower only works sometimes too.
If you wanna check this out, you can see part of the dial when at the hydrophone station; take a look to the right while the radar operator is sweeping, and you should be able to see the dial move, atleast part of it.
But if you wanna actually be able to read it, you'll have to change the angle value in Cameras.dat. I changed the Axis Rotation Properties for both radar stations to Max=45, and when I look up from the A-Scope, checking the bearing is no problem.