Submersible Helicopters are Cobra vehicles. They fly like ordinary helicopters, but when the need arises, they can travel underwater. While underwater, the main rotor is stopped while the rear rotor rotates towards the rear to become the propeller.
Cobra Commander deployed a group of S.E.A. Legs backed up by Amphibious Assault Guns in an attack designed to stop the space shuttle from deploying a satellite that has the ability to detect their future network of Undersea Bases. Cobra Commander and the Baroness coordinated the battle from the Submersible Helicopter. G.I. Joe was defending the Space Shuttle and were able to stop the S.E.A. Legs and Amphibious Assault Guns. While the Joes were distracted, Cobra Commander fired off a missile towards the Space Shuttle, but Hawk shot the missile down with a rife before it could damage the Space Shuttle. The Submersible Helicopter retreated to his Undersea Base.