There are no cons. The course is elementary. Yes, I would do it. The need before your trip really depends on the depths you're planning on diving.
What if you get caught in a downwhelling in Coz?
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There are no cons. The course is elementary. Yes, I would do it. The need before your trip really depends on the depths you're planning on diving.
I've never heard of a downwhelling.What if you get caught in a downwhelling in Coz?
I've never heard of a downwhelling.
Downwelling is a not a big concern....you'd have to exceed 130 ft to be in any real jeopardy, and you should certainly have caught yourself before then if you are paying attention. if you are not paying attention, then Nitrox wouldn't be your major concern. And one does not O2-tox instantly, even exceeding PPO2 limits, it still takes time. Time is your friend in downwelling...you have time to nice it, time to get out of it, and time to not tox.
What if you get caught in a downwhelling in Coz?
I read one of Dave's posts about riding down to 180 feet. Now, he may have done it for fun, but he stated that's why he stays on air when leading dives.
??I would not dive the Blue Hole or Whale Sharks in Belize with nitrox, but that's my preference.
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The Blue Hole is quite deep...it is not a Nitrox dive for anyone. Whale sharks are often quite shallow (the Belize site is 60-80 ft max), no issue on Nitrox there.