Scuba Diving Articles & Guides
Free scuba diving guides from Diving Standard — costs, certification, depth limits, safety, gear and the questions every new diver asks. Written by divers.
Costs & Certification
- How Much Does Scuba Diving Cost? (2026 Full Breakdown) — What you'll actually pay to try diving, to dive regularly, and to build your own kit — plus the smartest order to buy gear.
- How Much Is Scuba Certification? (Prices Around the World 2026) — What an Open Water course costs in the world's top dive destinations — and why your instructor matters more than the agency or the price.
- How to Get Scuba Certified: A Step-by-Step Guide (2026) — From choosing where to train to holding your certification card — the simple path every new diver follows.
- How Long Does It Take to Get Scuba Certified? — The realistic timeline for an Open Water course — and how to make it faster or more relaxed.
- Do I Need to Buy My Own Scuba Equipment? — Short answer: no — not for your first dives. Here's what to rent, what to buy first, and how to spend wisely.
- PADI vs SSI vs NAUI vs BSAC: Which Agency Should You Choose? — PADI, SSI, NAUI, SDI and BSAC all certify you to the same global standard. Here's how they differ, and the one thing that matters more than the logo.
Depth, Air & Time
- How Deep Can You Scuba Dive? (Depth Limits by Certification) — Maximum depths for every level — from a first try-dive to technical diving — and why limits exist.
- How Long Does a Scuba Tank Last? — Why the same tank lasts 90 minutes on one dive and 30 on another — and how to make your air go further.
- How Long Can You Stay Underwater Scuba Diving? — Two limits decide your dive time: how much air you have, and how much nitrogen your body can absorb.
- How Many Dives Can You Do in One Day? — Most divers do 2–4 dives a day. Here's what actually limits the number — and how to do more safely.
Safety
- She Followed Every Rule and Still Got The Bends (Decompression Sickness) — A textbook Open Water course in Koh Tao. No fast ascents, no missed stops, medically cleared by a cardiologist who is also a diving specialist. Five hours later she couldn't walk.
- Is Scuba Diving Dangerous? How Safe Is It Really? — An honest look at the risks — and why training, not luck, is what keeps divers safe.
- What Happens If You Run Out of Air Scuba Diving? — It almost never happens — and when it does, there's a simple, practised procedure to handle it.
- Can You Fly After Scuba Diving? (How Long to Wait) — Not right away. Here are the surface-interval guidelines that keep you safe from decompression sickness.
- Can You Scuba Dive With a Medical Condition? — Sometimes yes, sometimes no — it depends on the condition. Here's how the medical clearance process works.
- Types of Ocean Currents (and How to Dive Them Safely) — The currents divers encounter, what they do, and exactly how to handle each one.
- What Is Decompression Sickness (The Bends)? — What the bends actually is, why it happens, how divers avoid it, and what to do if you ever suspect it.
- What Is a Safety Stop and Why Does It Matter? — The three-minute pause at the end of almost every dive, what it does, and how it differs from a decompression stop.
- How to Avoid Seasickness on a Dive Boat — Practical, diver-tested ways to stop seasickness ruining your day on the boat, before, during and after the crossing.
First-Timer Questions
- Do You Need to Know How to Swim to Scuba Dive? — To try diving, no. To get certified, yes — here's the difference and what's actually required.
- Will Sharks Attack You When Scuba Diving? — The honest, reassuring answer backed by statistics: scuba divers are remarkably safe — and sharks are usually more scared of you.
- Will I Get Claustrophobic Scuba Diving? — Most people find diving liberating, not confining. Here's why — and how to handle nerves on your first dive.
- What Happens to Your Ears Underwater? (Equalizing Explained) — Pressure builds on your eardrums as you descend — here's how to equalize early, often, and pain-free.
- Can You Wear Glasses or Contact Lenses Scuba Diving? — You can't wear glasses under a mask — but prescription masks and soft contact lenses both solve it beautifully.
- Snorkeling vs Scuba Diving: What's the Difference? — Both let you explore the underwater world — but one keeps you at the surface, and one takes you right into it.
- Scuba Diving vs Freediving: What's the Difference? — One lets you breathe underwater like magic, the other strips it all back to a single breath. Here's how they compare, and which to try.
- Can Kids and Older Adults Scuba Dive? (Age Limits Explained) — How young you can start, whether there's an upper age limit, and what really matters more than the number on your birthday.
Destinations
- Best Scuba Diving Destinations in the World (2026) — The bucket-list dive spots worth crossing the planet for, plus the easiest places to start as a brand-new diver.
Gear & Skills
- What Is Nitrox (Enriched Air) Diving? — The blue-banded tanks you see on dive boats, what enriched air actually does for you, and what it doesn't.
- What to Wear Scuba Diving (Wetsuit Thickness by Water Temperature) — From a rash guard in the tropics to a drysuit in the cold, here's how to pick exposure protection that keeps you warm and comfortable.
- What Is a Dive Computer and Do You Need One? — The single most useful piece of safety gear you can own, what it does, and whether a beginner really needs one.
Freediving
- How to Train for Freediving (Breath-Hold Tables & Exercises) — The breath-hold tables, breathing drills and safety habits that build a longer, calmer hold, and how to run every one of them from your phone or Apple Watch.
Apps & Tech
- Best Diving Apps for iPhone (2026): Tested & Ranked — From full dive computers on your Apple Watch to logbooks and planners, here are the diving apps worth your home screen in 2026, and exactly who each one is for.
- Best Dive Computer Apps for Apple Watch Ultra (2026) — The Apple Watch Ultra is a capable dive computer once you add the right app. Here are the apps that turn it into one in 2026, compared honestly on price, features and conditions.
- Oceanic+ vs Diving Standard: Dive Computer Apps Compared (2026) — Two dive-computer apps for Apple Watch, one paid and polished, one free and packed with tools. Here is an honest, feature-by-feature comparison to help you choose.
Ocean & Conservation
- I Rescued a Drowning Pigeon From the Sea (Can Pigeons Even Swim?) — You asked what happened to the little guy. Here's the whole story, plus what to do if you ever find a bird struggling in the water.
Technical Diving
- What Is Technical Diving? Limits, Training and History (2026) — Where recreational diving ends and tech begins: decompression, mixed gases, overhead environments, the training path, and how a niche of cave explorers rewrote diving.
- The Deepest Scuba Dive Ever: 332 m, and Why It May Never Be Beaten — Ahmed Gabr touched 332.35 m in 2014 after a 12 minute descent and spent nearly 14 hours coming back. The full story of scuba's depth records, and the wall physics builds at 300 m.
- The Dives That Rewrote Tech Diving: Four Accidents and What They Changed — Sheck Exley at Zacatón, Yuri Lipski in the Blue Hole, David Shaw at Bushman's Hole, Guy Garman at St. Croix. What went wrong, told with respect, and the protocols each tragedy left behind.
- How Decompression Planning Works: Bühlmann, Gradient Factors and Gas Limits — Tissue compartments, M-values, gradient factors, deco gas ladders and the gas density line: the full picture of modern deco theory, its limits, and how to explore it hands-on.