slammers get all wimpy when there toes are wet

[JamesPagetButler]

slammers can't shoot if they are partially submerged

[aldrik]

Although there is a DeepWater layer in engine, surface units only transfer between Underwater and LandHorizontal, there's no ShallowWater layer. It doesn't make sense for bullet projectiles to be usable underwater. Indeed some of the commanders have this and yes that needs a cosmetic fix.