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Jadairiii,I read the study you posted, and found it quite informative, especially since my "victim" checked all the boxes:
1. novice snorkeler
2. bought FFM due to the low price at Walmart
3. 26 year old female
4. very low BMI,
5. very small features, "small boned", skinny
6. poor or non-existent swimming skills (life jacket was a dead giveaway)
7. ethnic (African American or Black)
So based on the study, very good chance the mask did not fit right and she was not physically adapted to the exertion of swimming. And now looking back at her actions and reactions, good chance she was experiencing hypercapnia and/or hypoxaemia.
Thanks. And I was, I also was able upon reaching her to get the mask up a little bit to flush it out. Those damn straps were a bitch! At a minimum those masks should have QR buckles, at least on one side.One of the things you could have done on the swim in is to tell her to breathe deeply.
Great rescue, by the way. ‘Glad you were there.
SeaRat