Subsurface Craft

Subsurface Craft in this atlas's Marine Vehicles category, craft that operate under the surface of the water, crewed or uncrewed. Belongs here: a submarine, a crewed submersible or a remotely operated vehicle. Does not belong here: a vessel that stays on the surface, gathered under Surface Watercraft. It is a family within Marine Vehicles and is divided into types below it where the atlas has them, with the individual vehicles of each kind, their makes and models, beneath those.