Hey guys! I would really like to play out a few submarine convoy attacks on a simulator to test a ATL scenario. For this I'm looking for a (computer) simulator of naval/submarine warfare. Any tips? I have the following preferences: - There should be a scenario builder or other way to (somewhat easily) mod a scenario. - It should be able to simulate a attack of multiple submarines. - It should be able to simulate WW2 naval/submarine warfare (considering the ATL this is a must). - If possible one should be able to change the characteristics of units. All tips and help is welcome!