Oceanographic equipment, namely, underwater cameras, [ thru-hull camera assemblies comprised of a video camera mounted inside a water-proof housing provided with a thru-hull fitting for taking video pictures through vessel hulls, high-pressure ceramic floating spheres used for buoyancy on deep submersible vehicles, camera control units, isolated variable transformers used as safety devices with underwater lights, ] pressure relief valves used to vent excess gas pressure from submersible housings that contain batteries or electronics circuitry, underwater batteries and underwater lasers

Underwater lights mounted to deep submersible vehicles [ and thru-hull light assemblies comprised of a high intensity discharge lamp in a protective housing and ballast circuitry ]