However, convoy escorts will still be able to fight against submarines once combat is initiated, even if subs are not normally detectable by enemy taskforces on the map. However, it is possible for a submarine to have a large enough advantage in spotting that the submarine task force will not be able to be spotted.

The chance for this to happen is based on how quickly the spotter will spot their target. Spotting an enemy sub outside of combat is based upon chance. This functions a little bit differently for subs. We have previously mentioned the spotting system, and how naval task forces are revealed over time.