Well, the makers of DW make radar and sonar things for navy, so you can imagine how realistic it is.
I played it when it was released and trust me, there“s 1000 little buttons, which you can press.
Oh and dont forget the cool missions! You can launch a navy seals to carry out some blackops from your sub, they get a rubberboat and go. That was awesome!
For me the game was alittle too "Sim". But still it was a neat game!