DeepSeaExplorer
Contributor
"The Coast Guard received a call at 2:24 p.m. Sunday from two men reporting that their dive instructor, Cummins, had not resurfaced from a dive. The three men had been cave diving from a 29-foot vessel in the Gulf of Mexico just offshore of Homosassa.
The two students resurfaced after a dive. . . "
You're making an assumption that they were not involved in a cave class. You may be correct, but I think you should give the benefit of doubt.