O-ring once bubbled...
I don't see a problem with this unless your mask strap (I use a thick neoprene one) causes your hood to leak and causes thermal protection to be compromised. I have never tried wearing mine under the hood, but I bet if I did under my DUI hood my head would freeze from the water coming in where the velcro straps would now be holding the area of the hood that seals to my face wide open.
If yours doesn't cause this, I don't see a problem...as for me, I ordered a spare mask because I don't think wearing my mask under my hood works for me.
Oring
In the NY area many divers wear the strap under the hood, it does help prevent knock offs... This works for un attached hoods where a little h20 doesnt make a bit of differe
nce, but f you are using an attched hood where its part of your drysuit seal, that wouldn't be a good thing....
Alban I wasn't attacking you, Just trying to bring up more points for thought.. The problem is too many divers get in over their head (no pun intended) and start doing dives they are untrained for and don't ever think of the consequences..
Locally this year we had 1 near death (the diver was technically dead), the person did not have the training or experience for the dive he was doing (he was solo diving).. He was found entangled, unconscious and no reg in mouth by one of the other divers on the boat.. He was brought to the surface, revived, evacuated by helicopter and needed several chamber treatments. This was a 17 year old diver who ended up having damage to his brain.. he has made almost a full recovery, but will never be able to dive again.
Technical diving properly executed is probably (overall) safer than your simple recreational dive becuase you plan for everything(or at least try to)..
The mask is a simple item, yet most people overlook its importance in the scope of things..