Eel is equipped with scuba gear with removable helmet and a diving knife, and is accompanied by a nameplate base. Underwater demolitions specialists, Eels reinforce the crews of Cobra vessels and facilitate Cobra marine outposts disguised as off-shore drilling rigs. Eels' two-part training program, staged in the Caribbean and in the North Atlantic, encompasses marine structural engineering, explosive ordnance, underwater fighting techniques and marine geology.