Sas
Contributor
Not all agencies specifically forbid it though. And i think its a good way of training. At this level the training should stress you as much as possible to improve your problem solving under stress and your way of prioritising issues. A card with "now give me your mask" or "You are now out of gas" isnt the same as suddenly having your mask vanish or trying to breathe in and getting nothing.
This is true though I would say that it should happen earlier in training. As I don't see what the big deal is with ripping student's masks off? I had heaps of trouble with that skill in OW class so my instructor was constantly pulling it off my face unexpectedly so I would get over it. Really glad he did as it got me over worrying about my mask coming off. When someone's mask is kicked/knocked off u/w it is rarely expected so I think instructors should do more things like this to stress out students from OW classes onwards. And if people can't handle losing their mask unexpectedly at that level well then it is a good indication that they should just not dive all together...