BENTHOS

oceanographic, deep sea and underwater equipment, and parts thereof, namely, acoustic transponders, acoustic releases, pingers, [ marine geological core samplers, ] glass flotation spheres, glass instrument housings [ , submersible recovery beacons, video cameras, 35MM still cameras, digital still cameras,] [ 35MM camera flashes, ] battery packs, [ camera control consoles, ] deep sea altimeters, hydrophones, hydrophone arrays, [ preamplifiers, hydrostatic pressure testing chambers]