(5) Elementary instruction and training in—
(a) Diving-gear nomenclature.
(b) Diving-gear maintenance.
(c) Hazards of diving.
(d) Physics of diving.
(e) Skin diving.
(f) Recompression tanks and tables.
(g) Air compressors, air flasks, field expedients.
(h) Signals and communications.
(i) Ship construction.