Enemy ships do search for the player if you are detected, but I think the main problem is they give up too easily. At the moment they simply travel to the place where they last detected you, take a quick look around, then return to whatever they were doing. I'll try to make them search more intelligently in the future - using search patterns, cruisers launching ASW helicopters, etc.
I'm also planning to simulate the active sonar on enemy warships more thoroughly in a future update. Hearing the pings of enemy destroyers searching for you is a vital part of any sub sim
Real time mode is also planned - it will probably be added as an optional feature in the next update.
If you would like to make a donation, you can send it through Paypal to
subcommandergame@gmail.com.
Thank you!