[THE_MASK]

What about just some simple flooding inside the sub . The more damaged the sub gets the harder it is to use the controls (controls are underwater and hard to see)/ controls don't work . Sonar/hydro room controls don't work for example while under water . Flooding would go chest height and it would have blur effect so difficult to find things / use things . You could have 2 bilge pumps operated either side of the sub in the engine room . So 1 pump operated by 1 guy gives half speed pumping out or have 2 guys , 1 on each pump to pump the water out faster . Bilge pump is linked to electric engines and uses electric stored power . Engine room operator would have to keep a very careful eye on the battery level . Another idea about the flooding is keep the water horizontal but tilting the boat down or up could raise the level forward or aft . Just gives the person in control of the dive controls something to think about . If the sonar/hydro room controls dont work then he might as well be pumping out water in the engine room via the bilge pump switch . Controls should work when clear of water . I am just thinking about what you said about people only playing between 1 and 3 hours which is true . You wouldn't want something destroyed and unrepairable or having a timer for damage . I cannot see how health would need to be modelled . The flooding water could have some weight affecting buoyancy . You wouldnt need visual damage apart from flooding and smoke imo . Sitiing on the bottom of the sea would be enough incentive not to get hit by shells / bullets / depth charges lmo . CO2 ? maybe as CO2 builds up you could have vapors like in the engine room currently so that it eventually gets too much too see anything inside the sub .
Neal : someone man the pump , the waters knee high .
Neal : Hydro , is the Hydro still operational .
Hydro : Yes sir .
Neal : depth charges close , the water is rising .
Neal : is the hydro operational
Hydro : No sir
Neal : Hydro , go man the second pump .