Guides

Training & Certification

How certification levels line up across PADI, SSI and CMAS, what each course covers and how to pick the next one.

Course content and prices differ between dive centres. These guides help you know what to ask before you sign up.

Training & CertificationSeptember 11, 20267 min read

When to Take the Rescue Diver Course: Prerequisites and Readiness

Rescue diver prerequisites at PADI, SSI, NAUI, CMAS and BSAC, what the course covers, how long it takes, the first aid and oxygen training needed and when to start.

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.

Training & CertificationAugust 8, 20267 min read

Is Advanced Open Water Worth It? Required Dives and Best Electives

What the Advanced Open Water course involves at PADI, SSI, NAUI, CMAS and BSAC, what the card gets you on a boat, the fair criticisms and which dives to pick.

Training & CertificationAugust 7, 20268 min read

Returning to Diving After a Long Break: Refresher, Medical and Gear

When a scuba refresher is recommended, what PADI, SSI, NAUI and BSAC refreshers include, when to see a doctor, and which gear to service before diving again.

Training & CertificationJuly 11, 20267 min read

How to Improve Buoyancy and Trim in Scuba: Causes, Drills, Fixes

Why divers bob up and down or swim head-up, how much lungs, BC gas, suit and cylinder shift you, and the hover and fin pivot drills that fix it.

Training & CertificationJuly 9, 20267 min read

How Much Weight Do You Need for Scuba Diving? (And How to Check It)

Starting weights by wetsuit thickness, what salt water and aluminium cylinders add, and the end-of-dive weight check that gives you your real number.

Training & CertificationJuly 7, 20268 min read

Buddy Check Step by Step: BWRAF and the Faults It Catches

What a scuba buddy check covers, BWRAF next to SEA BAG, ABC and BSAC, what to look at in each step, and the faults the research shows it catches.

Training & CertificationJuly 6, 20269 min read

How to Equalize Your Ears When Diving, and What to Do If You Can't

How to equalize your ears when diving: Valsalva, Toynbee, Frenzel, Lowry and tubal opening step by step, what to do if an ear won't clear, and barotrauma signs.

Training & CertificationJuly 2, 20269 min read

PADI vs SSI vs CMAS: How the Three Dive Agencies Differ

PADI and SSI are companies, CMAS is a federation of national bodies such as FFESSM. How ownership, course pricing, instructor rules and recognition differ.

Training & CertificationJune 27, 20268 min read

Scuba Diving After 50: Is It Too Late to Learn, and What to Check

PADI and SSI set no upper age limit for scuba. What changes after 50: heart risk in DAN data, the medical checks that matter and realistic fitness targets.

Training & CertificationJune 25, 20268 min read

What Age Can Kids Start Scuba Diving? Agency Limits and Readiness

Kids can try scuba in a pool at 8 and certify at 10 with PADI or SSI. Depth limits by age for PADI, SSI, CMAS and BSAC, plus medical and readiness advice.

Training & CertificationJune 23, 20267 min read

How Much Does a Scuba Diving Course Cost? Open Water Prices Compared

What an Open Water course costs and what the price covers: agency eLearning fees, listed prices from dive centres in nine regions, extras and questions to ask.

Training & CertificationJune 22, 20269 min read

Scuba Diving vs Snorkeling: Is Scuba Harder, and Which Suits You?

Scuba diving vs snorkeling: training, depth, time underwater, cost and risk side by side, with try-dive rules from PADI and SSI and snorkel safety research.