Pre-Dive Checks
Turn gear checks into a standard habit so you are not relying on memory or rushed last minute inspections at the edge of the water.
Dive Planning: Gas Management and Pre-Dive Preparation
Planning a dive is more than picking a site and jumping in. Good planning means understanding your gas needs, choosing safe depth limits, and running simple pre-dive routines that keep you and your team ready before you ever descend.
Understanding What Matters
Control of Self
Understanding Nitrox
Understand Nitrox, its real benefits, limits, and safe depth planning. Learn how it reduces nitrogen load and how to use it correctly on recreational dives.
Calculating Maximum Operating Depth (MOD)
Understand what Maximum Operating Depth represents, how oxygen partial pressure determines MOD, how to calculate it for Nitrox, and why the limit matters underwater.
Equivalent Air Depth (EAD)
Understand what Equivalent Air Depth means, how the EAD formula works, why Nitrox produces a shallower EAD, and why the concept is mostly theoretical for modern recreational divers.
RMV vs. SAC: What’s the Difference and Why It Matters
Learn the difference between SAC and RMV. Understand why experienced divers rely on RMV and how to calculate it correctly.
Control of the Dive
GUE EDGE Dive Planning
Walk through the GUE EDGE framework and see how a simple, repeatable structure makes dives more predictable for you and your buddy or team.
Dive Briefings Are Not Formality
An introduction to the UNITED-C dive briefing framework and how structured briefings help dive teams build shared understanding before entering the water.
Minimum Gas Reserve
Calculate your minimum gas reserve with the CAT formula. 100 ft example, ATA math, AL80 PSI conversion, and why divers round up for safety.
