Blog
Diving education, gas physics, and product updates.
Slate Now Imports Directly From Your Dive Computer
Slate adds wireless Bluetooth import for Shearwater, Suunto, Mares, and Oceanic dive computers. No desktop software. No cables. No account.
Dalton 1.1: Your Calculations, Anywhere
Dalton 1.1 adds link sharing, home screen widgets, and shareable formula cards -- turning a personal gas calculator into a team coordination tool for technical diving.
Introducing Slate: Every Dive Tells a Story
Slate is a professional dive logbook for iPhone. Import wirelessly from any dive computer, log every detail, track your career stats, and export freely. Your data stays on your device.
Introducing Dalton: Know Your Mix Before You Get Wet
Dalton is a professional gas verification tool that scales from checking your nitrox MOD to planning trimix at depth -- seven focused calculators, every formula published, all results verified against published industry tables and dive computer reference data.
Thermoclines and Water Temperature Effects on Diving
Water temperature affects everything from buoyancy to gas consumption to decompression risk. Learn about thermoclines and how temperature shapes your dive.
Understanding Dive Tables
Dive tables translate depth and time into decompression limits. Learn how they work, how to read them, and how they compare to dive computers.
The Rule of Thirds: Gas Management for Overhead Environments
The rule of thirds is a gas management strategy that reserves enough breathing gas to handle emergencies. Learn how it works and when to apply it.
Gas Consumption and SAC Rate
Your SAC rate tells you how fast you use gas. Learn how to calculate it, why it matters for dive planning, and how to improve it.
Surface Intervals and Repetitive Diving
Your surface interval determines how much residual nitrogen you carry into the next dive. Learn how repetitive dive planning works and why it matters.
Decompression Sickness: What Every Diver Should Know
DCS occurs when dissolved gas forms bubbles in your body during ascent. Learn the types, symptoms, risk factors, and what to do if it happens.
Nitrogen Narcosis: Signs, Causes, and Management
Nitrogen narcosis impairs judgment at depth. Learn how it works, how to recognize it, and what divers do to manage the risk.
Oxygen Toxicity: CNS and Pulmonary
Oxygen is essential for life but toxic under pressure. Learn about the two types of oxygen toxicity, their symptoms, and how divers manage the risk.
Gas Density at Depth
Dense gas is hard to breathe. Learn how to calculate gas density at depth and why it matters for work of breathing and safety.
Equivalent Narcotic Depth (END)
END tells you the narcotic effect of a trimix at depth, expressed as an equivalent air depth. Essential for technical divers using helium.
Equivalent Air Depth Explained
EAD lets you use air decompression tables with nitrox mixes. Learn the formula, see a worked example, and understand when to use it.
Best Nitrox Mix for Your Dive
How to calculate the optimal nitrox mix for a given depth — maximizing bottom time while staying within safe oxygen limits.
Minimum Operating Depth (MinOD)
Hypoxic trimix can be dangerous at the surface. MinOD tells you the shallowest depth at which a gas mix is safe to breathe.
Understanding Maximum Operating Depth (MOD)
The MOD formula tells you the deepest you can safely go on a given gas mix. Learn how it works, why it matters, and how to calculate it yourself.
Nitrox Basics: EAN32 vs EAN36
A practical comparison of the two most popular nitrox blends — when to use each, their depth limits, and the real-world benefits.
Reading Gas Labels: EAN, Trimix, and Heliox
A quick reference guide to gas mix nomenclature — what the numbers mean, how to read tank labels, and the conventions used across the diving industry.
Partial Pressures and Dalton's Law
Dalton's Law is the foundation of all gas physics in diving. Learn how partial pressures work and why every diver should understand them.
Henry's Law and Gas Absorption
Henry's Law explains why gases dissolve into your tissues under pressure — and why they come back out when you ascend. It is the foundation of decompression theory.
Boyle's Law and Equalization
Boyle's Law governs how gas volumes change with pressure. It explains why you equalize, why you never hold your breath, and how your BCD works.