How-to guides for snorkelers and divers — technique, safety, gear care and the questions beginners actually ask.
Newest first
SnorkelingTutorial
Plenty of people snorkel in contacts and nothing goes wrong; official guidance is stricter. What the FDA and CDC say, which lenses to wear, and the one habit.
Series: Snorkeling with glasses
Scuba divingTutorial
A prescription dive mask is a different purchase from a snorkel mask, and depth is the least of it. Reading a computer is close work, and masks come off.
Series: Snorkeling with glasses
SnorkelingTutorial
Stock mask lenses correct sphere only, and leave astigmatism where it was. The ranges premade lenses cover, the number that forces custom lenses, and costs.
Series: Snorkeling with glasses
SnorkelingTutorial
No, and not for the reason you expect. Swimming protects you from one kind of drowning and almost none of the other. What a non-swimmer actually needs.
Series: Staying afloat
Scuba divingTutorial
Nitrox buys you longer no-stop times, but on a standard cylinder you run out of gas before you run out of table at every depth shallower than about 100 feet. The arithmetic, the depth limits, and what fourteen dive shops charged on 10 August 2026.
Series: Getting into scuba
Scuba divingTutorial
Asthma stopped being a blanket bar to recreational diving years ago; an individual assessment replaced it. What the form asks, and where guidance differs.
Series: Getting into scuba
Scuba divingTutorial
You have booked a first dive and nobody said what it involves. The age, medical and swimming gates as agencies write them, and what goes wrong on a descent.
Series: Getting into scuba
Scuba divingTutorial
Your diet plays a big part in how you feel before and after a dive. Learn which foods raise your energy and which ones you should never eat beforehand.
Scuba divingTutorial
Twelve hours after one dive, eighteen after several — DAN's numbers. What each agency publishes, why driving counts as flying, and what if time has run out.
Series: Getting into scuba
20 guides
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