Oh is it ? my bad D <| sep |> A fair answer you don ' t personally care but you are complying with mandates from the training agency and insurance company . I think you are badly misreading this . It is the responsibility of any individual to determine medical fitness , and it is their right to not have to tell some dude in a dive shop their medical history . It ' s downright invasive that someone thinks they need to know I have had a vasectomy or am postmenopausal . Smart dudes in a dive shop know it is insane to offer medical advice . People have ample opportunity to ensure their own safety , and dive operations have no business getting involved in a customer ' s medical care . <| sep |> I ' m fairly certain this is incorrect , both from experience and several reports of commons breaking out of combinations they should be strictly incapable of , but I ' d be curious to hear your source for the idea that the catch rate is the same .