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Scuba diving guides

Articles on dive skills, certification, dive planning and dive sites.

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Dive Computers & DecompressionJuly 29, 20267 min read

How Long Does a Scuba Tank Last? Minutes by Depth and SAC Rate

A 12 L tank at 200 bar lasts a 20 L/min diver about 45 min at 10 m, 32 at 18 m and 22 at 30 m. AL80 figures, SAC rates and why the reserve comes first.

Dive Computers & DecompressionJuly 27, 202610 min read

What Is NDL in Diving? No-Decompression Limit Table by Depth

NDL means no-decompression limit, the longest time at a depth with no required stops. No-stop tables for 12-42 m and 40-140 ft from DECO 2000 and US Navy.

Dive Computers & DecompressionJuly 25, 20269 min read

Safety Stop in Scuba: Why 3 Minutes at 5 m and When It Matters

What Doppler studies show about safety stops, what PADI, BSAC, VDST and dive computers recommend, the NEDU deep stop result, and how to hold a stop in current.

Safety & Dive MedicineJuly 23, 20268 min read

Panic While Scuba Diving: Warning Signs, Triggers and What to Do

What research says about panic in diving, early signs in you and your buddy, stop-breathe-think-act, and how to train out triggers such as mask flooding.

Training & CertificationJuly 22, 20261 min read

How to Log a Dive: What to Record After Every Scuba Dive

What to record in your dive log after every scuba dive: depth, bottom time, gas, conditions and buddy, when to write it up and paper versus digital logs.

Scuba GearJuly 20, 20268 min read

Jacket, Back-Inflate or Wing? How to Choose Your First BCD

Jacket, back-inflate and wing BCDs compared: where the air sits, lift capacity and how to size it, integrated weights, travel weight, fit and what to test first.

Scuba GearJuly 18, 20267 min read

How Much Does Scuba Gear Cost? Prices by Item, Tier and Upkeep

Scuba gear prices item by item from maker and shop listings: mask, fins, wetsuit, BCD, regulator, computer and cylinder, plus what servicing costs each year.

Scuba GearJuly 16, 20269 min read

Renting vs Buying Scuba Gear: What to Buy First and What to Rent

Should you buy or rent scuba gear? The usual buying order, rental prices from named dive centers, regulator and BCD service costs, and when renting wins.

Scuba GearJuly 15, 20269 min read

Wetsuit Thickness Guide: What to Wear at Each Water Temperature

Wetsuit thickness by water temperature in °C and °F from Waterproof, BARE, Mares and O'Neill charts, plus depth compression, hoods and four dive regions.

Scuba GearJuly 13, 20269 min read

How to Choose a Dive Mask: Fit, Prescription Lenses and Fogging

How to choose a dive mask: the fit test, tempered glass, skirt color, window types and volume, prescription lenses, new-mask fogging and diving with contacts.