— FIELD NOTES —

Field Notes.

Educational writing — physiology, technique, equipment, and environment. Evergreen and text-led, written as if briefing a student before a dive.

Decompression theory

What Your Dive Computer Is Telling You

M-values, gradient factors, conservatism settings — the one concept that makes every number on your computer make sense.

11 min read

Knowledge

Is Nitrox Worth It? An Honest Look at Enriched Air

What enriched air actually buys you, where it helps most, and whether it genuinely reduces post-dive fatigue.

8 min read

Getting started

PADI, SSI or SDI?

They meet the same ISO standard, so the badge barely matters. How PADI, SSI and SDI actually differ — and what does.

10 min read

Physiology

Why you pee when you dive

You pee more when you dive — and it isn't from drinking too much. Why that happens, why diving dehydrates you, and what to do about it.

7 min read

Gas planning

How to calculate your SAC rate

Work out your air consumption from any dive with three numbers, learn what a good rate really is, and turn it into gas planning. Calculator included.

9 min read

Technique

Weight placement & trim

Where you carry your weight changes your trim, not your buoyancy. How your body and kit set your balance — and why no single setup fits all.

8 min read

Technique

How to equalize your ears

Ear trouble is the most common thing new divers struggle with — and the most preventable. How to equalise early, often and gently, and what to do when one ear won't clear.

8 min read

More as they're written. Field notes publish one at a time, when there's something worth saying — never on a schedule.

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