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Scuba diving guides

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

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Dive Computers & DecompressionOctober 26, 20269 min read

Suunto Fused RGBM 2 vs Bühlmann 16 GF: Which Algorithm to Use

Which Suunto computers run Fused RGBM 2, Bühlmann 16 GF or both, how to switch, what each changes, and no-stop times at Suunto's gradient factor presets.

Dive DestinationsOctober 26, 202611 min read

Best Time to Dive Roatán and Utila: Honduras Diving Season by Month

Roatán and Utila diving by month: sea and air temperature, rain, northers, hurricane odds from NOAA data, whale shark timing and the best months for each goal.

Dive DestinationsOctober 24, 20269 min read

Best Places to Dive With Manta Rays: 13 Sites and Their Seasons

Where to see manta rays: 13 dive and snorkel sites with reef or oceanic species, best months from research and park data, and October-November options.

Training & CertificationOctober 24, 20268 min read

Dive Computer Questions New Divers Ask, Answered

How a dive computer tracks nitrogen, what NDL means, what counts as a repetitive dive, and what to do after an overstay, a failure or before a flight.

Dive DestinationsOctober 23, 202611 min read

Palau Diving Season: Best Time to Dive by Month, Mantas and Sharks

Palau diving season by month: sea temperature, rain and wind from NOAA data, the typhoon record, mantas and reef sharks in October-November, sites and permits.

Training & CertificationOctober 23, 20269 min read

CMAS 1, 2 and 3 Star Diver: PADI and SSI Equivalents by Level

What CMAS One, Two and Three Star divers may do, which PADI and SSI courses sit closest to each star, and the depth limits your card carries abroad.

Training & CertificationOctober 21, 20269 min read

Water Pressure at Depth Chart: Bar, Atm and PSI by Metre and Foot

Pressure at 0-60 m and 0-200 ft of salt and fresh water in bar, atm and psi, how deep 10 bar and 20 bar are, and what that pressure does to a diver.

Training & CertificationOctober 20, 202610 min read

Scuba Diving Hand Signals: Chart, Gas Numbers and Night Light Signals

Scuba hand signals in one chart: OK, problem, up, low and out of air, gas pressure numbers, night light signals and surface signals, with agency differences.

Dive Computers & DecompressionOctober 20, 202610 min read

Dive Computer Conservatism Settings by Brand, With No-Stop Times

What the conservatism setting changes on Shearwater, Suunto, Garmin, Mares, Scubapro, Cressi, Aqua Lung and Oceanic computers, with no-stop times per level.

Dive DestinationsOctober 19, 20269 min read

Best Time to Dive Dahab: Water Temperature, Wind and Sites by Month

Dahab diving by month: Gulf of Aqaba sea temperature from NOAA data, wind, wetsuit thickness, the main shore sites and the facts behind the Blue Hole Arch.