Holding breath during CESA and buoyancy exercises

[guruboy]

Most pools aren't deep enough to meet the CESA length requirements, so it works easier horizontally. Also removes the threat of air expansion injuries during the pool session.

 

[boulderjohn]

Quite a while ago, a UHMS analysis of accidents during scuba instruction identified CESA instruction as the event for such accidents. It recommended changes to the way it is done, and almost all agencies now follow those recommendations. Almost all agencies teach it the same way now. If an instructor chooses to do it differently, he or she will have a hard time justifying that decision in the event of an accident.

 

[boulderjohn]

Most pools aren't deep enough to meet the CESA length requirements, so it works easier horizontally. Also removes the threat of air expansion injuries during the pool session.

...which for PADI is 30 feet.

 

[tursiops]

Horizontal?! For my recent SDI OW class, CESA was vertical from the deep end of the pool, about 12', and for the check out dive, from about 23'. I suspect the instructor who shut off the student's air was doing it on the sly (aka not agency sanctioned).

Yes, PADI is specifically horizontal in the pool, but vertical in open water.