Scuba Tech Philippines
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Wreck diving specialist with 25+ years experience across the globe. I specialize in providing RAID Sidemount, Technical, Advanced Wreck and Recreational Deep/Trimix Courses. Training is personally tailored to your individual level; with a strong emphasis on developing solid fundamental skills, best practice protocols and a high standard of all-round diving proficiency. As an instructor, I utilize
17/04/2026
Sidemount: Principles For Success (eBook)
The complete, fully illustrated, guide for first-time success with your sidemount gear configuration. Everything you need to know for fast optimal results and a sublime sidemount diving experience. Get it right - first time!
251 Pages. Printable PDF format. Fully Illustrated. Only $25
Buy it here: https://buymeacoffee.com/andydavistech/e/111242
Or message me directly for PayPal purchase.
Student report on doing the Advanced Wreck course with me earlier this year...
13/03/2025
Gas Management for Scuba Divers (Metric) eBook
The comprehensive, illustrated, metric guide to advanced gas planning and management for safer scuba diving.
Only $9
60 Pages. Printable PDF format. Fully Illustrated.
Buy it here:
buymeacoffee.com/andydavistech/e/233191
Scuba gas planning is a neglected fundamental competency in mainstream recreational diving training. It is simply the ability to accurately calculate your gas consumption and use that information to determine the limits of your dive compared to the gas supply you will carry when diving.
As a scuba diver, you should know how long you can stay at a planned diving depth; and allocate sufficient gas for your ascent. including a calculated gas reserve to mitigate against foreseeable emergency scenarios; such as air-sharing with a dive buddy.
This ebook describes the complete process and methods of planning safer recreational dives!
eBook Chapters:
Gas Management For Scuba Divers
Why is scuba gas planning important for divers?
Gas Planning in Metric versus Imperial
Metric versus Imperial Benefits
Variation in Air Consumption
Gas Supply Calculation
Cylinder capacity
Diving Gas Management calculating cylinder volume
Calculating cylinder gas volume
Scuba Gas Planning: cylinder pressure and volume
Understanding Depth and Pressure
Depth to ATA calculation
Metric depth to ATA formula
Imperial depth to ATA formula
Surface Air Consumption Calculation
The SAC formula
Accurate SAC rate calculation
Calculating Gas Consumption at Depth
Respiratory Minute Volume
The RMV calculation
Calculating Gas Duration at Depth
Calculating usable versus reserve gas
Common reserve gas pressures in scuba diving
Calculating reserve and usable gas volume
Calculating BAR/min for dive management
Calculating the gas duration on a dive
Gas Planning Table
Calculating ascent gas consumption
Calculating the average ascent depth
Calculating average ascent depth with a safety stop
Calculating a realistic gas reserve volume
What is a Rock Bottom Gas Reserve?
Calculating Rock Bottom Gas Reserves
Example Rock Bottom Gas Reserve calculation
Creating a Rock Bottom Gas Reserve Table
Example Rock Bottom Reserve Table
Accelerated gas consumption in emergencies
Gas Density Limits and Helium Use
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| Friday | 8am - 6pm |
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| Sunday | 8am - 6pm |
