Attn: scuba instructors. This kit has what you need for a fun advanced open water diver class.
100’ tape for the kick cycles, a lift bag and ropes for search and recovery, various drop floats and floats to tie up for underwater navigation skills, a color ring for deep diving, an old analog depth gauge for comparisons, fish identification cards. An old style snorkel to demonstrate mouth to snorkel breathing. Tons of fun.