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Dive Computers & DecompressionSeptember 2, 20268 min read

Nitrox MOD, EAD and Best Mix Calculations: Worked Examples

Step-by-step nitrox MOD at 1.4 and 1.6 bar, EAD checked against an air table, best mix for a planned depth, and how to analyse and label a tank.

Dive Computers & DecompressionAugust 31, 20268 min read

Is Nitrox Worth It? The Real Bottom Time Gain at 18-30 m

NOAA no-stop limits on air, EAN32 and EAN36 at 12-33 m, what the fatigue studies found, what nitrox costs, and the dives where it adds nothing.

Dive Computers & DecompressionAugust 30, 20267 min read

How to Calculate Your SAC Rate and Lower Your Air Consumption

A worked SAC rate example from a logged dive, what the number is for, and the measured effects of workload, cold, stress, trim and weighting on your air use.

Dive Computers & DecompressionAugust 28, 20268 min read

Repetitive Dive Planning: Surface Intervals on the DECO 2000 Table

How long to wait between dives: surface intervals on the DECO 2000 table, group letters and residual nitrogen time, with a worked two-dive day.

Dive Computers & DecompressionAugust 26, 20268 min read

How to Read the DECO 2000 Dive Table: A Worked Example

Read Dr. Max Hahn's DECO 2000 table step by step: round depth and time up, find the no-stop limit, stops and group letter, then follow one worked dive.

Safety & Dive MedicineAugust 24, 202610 min read

Ear Barotrauma vs Swimmer's Ear: Symptoms, Urgency, Diving Again

Middle ear and inner ear barotrauma compared with swimmer's ear: causes, symptoms, which signs need urgent care, prevention on trips and return to diving.

Safety & Dive MedicineAugust 22, 20268 min read

Dive Insurance Explained: What DAN and Travel Policies Cover

Real travel insurance wording on scuba depth limits, what DAN and other dive accident plans pay for, hyperbaric and evacuation costs, and what to check.

Safety & Dive MedicineAugust 21, 202611 min read

Flying After Diving: How Long to Wait (12, 18 or 24 Hours)

How long to wait before flying after diving: 12 hours after one dive, 18 after several dives or days, 24+ after deco dives. DAN, US Navy and PADI compared.

Training & CertificationAugust 19, 20269 min read

How to Deploy an SMB (DSMB) From Depth, Step by Step

Step-by-step DSMB deployment with a reel or spool: open vs closed buoys, inflation methods, how runaway ascents happen, colour conventions and practice drills.

Training & CertificationAugust 17, 20268 min read

Drift Diving Basics: Entries, Staying Together and Surface Signals

How a drift dive works: negative entries, staying with the guide, reef hooks, which signals to carry, what to do if separated, and gas planning in current.