Techniques to prevent eye pressure buildup and bleeding through eyes when snorkeling and scuba diving? [closed]
I know of techniques to prevent and relieve ear pressure buildup (or more precisely, ways to equalize Eustachian tube pressure with the outside pressure). But how about techniques to relieve or even ...
I'm going to Australia next October and I was wondering if it is safe to go diving (near Cairns) even though it will be my first time doing so. Should I take a course locally before the trip?