[2. BSAC Extended Range Diver]
The aim of the BSAC Extended Range Diving course is to train you in safe deep diving techniques, To encourage a responsible and flexible approach to extended range technical diving.

The course will teach you to dive with multiple cylinders, using nitrox blends up to 100% O2 for accelerated decompression, executing deep decompression dives down to 50 metres.

Again, the BSAC Extended Range Diving course consists deep diving theory and practical application in open water.

Theory content includes:

• [An Inroduction to Extended Range Diving]

What is ERD?, Why do it?, What does it require, the BSAC ERD Course

• [Personal Preparation for Extended Range Diving ]

Awareness, responsibility, attitude, Training, self-reliance, physical and mental preparation, Managing stress, coping with narcosis

• [Decompression Diving]

Tools – Tables, PC Software, Dive Computers , Run Time Management, Rich Nitrox mixes, Oxygen Tracking, Good Decompression Practice

• [Personal Equipment ]

Bottom Gas Systems , Decompression Gas Systems, Combining systems, Configuring Regulators and Gauges, Buoyancy Compensators, Diving Suits, Support Equipment, Surface Survival, Equipment Rigging and Configuration

• [Group Equipment]

The Platform: Hard Boats, RIBs; Liaison with skipper, Decompression Systems

• [Extended Range Dive Planning]

Dive Team Agreements, Dive Planning, Support Divers, Emergency / Contingency Plans



[Open Water Dives on the Extended Range Diving Course]

Dives on the Extended Range course start shallow, and get progressively deeper reaching 50 metres by the end of the tech course.

This gives us the chance to get you diving on the Unicorn Shipwreck or WW2 Schooner north of Koh Tao [visit our wreck diving archive to view photos and find out details].

In the water, we'll concentrate on the following activities:

• Pre dive self & buddy check
• Visualisation techniques
• Fitting of stage cylinders
• Regulator switching
• Out of air scenarios
• Air sharing techniques
• Self & buddy monitoring
• Using decompression stage cylinders
• Fitting & removing stage cylinders underwater
• Gas switching
• Swimming with side mount cylinders
• Deployment of delayed surface marker buoy
• Ascent skills
• Buoyancy skills during decompression stops
• Body position and techniques during decompression stops
• Surface decompression techniques
• Removal of kit in-water
• Gas management
• Use of run time slates
• Use of lazy shot or trapeze decompression systems
• Underwater navigational techniques
• Deployment & use of distance lines
• Gas management & control
• Practice of extended decompression stops
• Switching to decompression gas
• Use of Jon lines
• Use of emergency stage cylinders
• Brief for support divers and extended range diver team
• Assembly of deco station and emergency equipment
• and more . . . . .

As you can see this is a very comprehensive tech course.

BSAC Tech training includes not just being good in the water - the course covers wider aspects of technical diving, so you have the skills and knowledge to execute deep tech dives.


Our BSAC Technical diving courses include:

• BSAC Advanced Nitrox & Extended Range Diving Manuals
• Use of all technical diving equipment
• Certification
• All required training dives & gases

i.e. no hidden extras!
The cost of the BSAC Advanced Nitrox + Extended Range Diving Course is 50,000 baht.

We can run the courses individually for 30,000 baht each.

This includes the Open Water dives, conducted on Koh Tao's local dive sites.

[Each May/June & Autumn, we run tech liveaboards to the South China Sea, diving some enormous WW2 wrecks [visit our tech liveaboard page for details]. For just a little extra we can combine your BSAC technical diving training with a liveaboard expedition.]

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