Stinger: A prototype "next generation" attack vessel, this one-man sub allows you to orientate in any direction to fire your weapon accurately.

Sea Truck: Slow and bulky, this vessel may move up and down and change it's orientation between left and right. It's weapons are torpedoes and mines which may be dropped behind it. Furthermore it is the only vessel that can pick up undersea objects for transport

Remote (HR) Probe: Small and agile, this vehicle contains only a very simple weapon. It's main purpose however is underwater welding and repair of objects. It can also activate switches

Darwin - Intelligent Dolphin and SeaQuest mascot: Darwin the dolphin is perhaps the most agile of the vehicles, and may take off in bursts of speed. However Darwin has no weapons with which to defend himself and is very vulnerable. Darwin is able to get into tiny spaces that none of the other vehicles can reach. Darwin is able to activate switches.