Thanks for the post. I wouldn't have thought it possible, still question the sanity, safetey, and DEFINTATELY won't be diving that kind of water in that kind of protection, but, hey - congrats on having a good dive!
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Good work on the dive. I had to abort today's dive because it was too windy. It was so windy that a large fish was beaten to death against the rocks and seagulls were having trouble landing on it for lunchtime.
It looks like I was wrong about the exposure gear. It sounds like you've found something that works out well for you. I wouldn't have thought it possible, but there we go.
Ok, with a 2 piece 3mm, gloves, hood and boots... you should be able to stay alive for around 2 to 4 hours.. depending.... so a 15 minute dive gives you lots of margin for error.
And in say 34 degree water, your mouth would be... ah 34 degrees...having done a lot of ice dives, your description is missing a few details...