The third was in reference to the proper procedure if you run out of air. The correct answer should be one of the other choices, which was "current", which is certainly affected by bottom structures which can block it or change it's direction. Unless of course the reference is to such large structures that you can't see over or around them but that's not really visibility as the term is generally understood. Visibility won't be affected unless whatever the material the bottom consists of is stirred up. The second was a question about ground terrain affecting which factor of a dive, the "supposedly correct" answer was "visibility". I don't recall seeing anything remotely close to a single finger slicing across the neck which is the correct signal for that. The answer - in my opinion- should be "stay at this depth" and yet the "correct" answer was "out of air". One of them shows a still image with a diver giving a hand signal with a horizontal hand across the chest. I was reviewing the PADI OW final exam questions with my girlfriend and IMHO there are 3 or 4 poorly worded questions or the answers are simply wrong.
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