Extended Range Nitrox

1. Extended Range Nitrox Course Introduction

2. Introduction • Course Aims • Equipment Requirements • General Requirements • Diver Preparation • Stop – Breathe – Think • Lecture Plan • Theory Exam • Qualifying Dives • Additional Information

3. Course Aims • Unlimited Mandatory Decompression • EAN 100 • Max Depth 50m • No Direct Route to Surface • Correct Equipment • Mental Attitude • Safety, Competence, Experience - Practice

4. Equipment Requirements • Personal Equipment • Familiarity with Equipment • Well maintained • Oxygen Service • Breathing Gas - Cost

5. Equipment Requirements • Recommended Equipment • Manifold Twin – Set • 2 x Stage Cylinders • 2 x Methods of Buoyancy Control • 2 x Buoyancy Devices • Run-time Slate • Regulators(1.5 - 2m interstage hose on primary reg), contents gauges, whips • 2 x Torches

6. Equipment Requirements • Recommended Equipment • 2 x Cutting Implements • 2 x Masks • 2 x Reels ( 100m & 50m line minimum) • 2 x DSMBs ( 1 Red, 1 Yellow) • Dry-Suit • 2 x Timers/Computers • Tables • Jon-Line, Tally Clip

7. General Requirements • Attitude • Equipment • Knowledge • Training • Experience

8. Diver Preparation • Goals • Pre-dive visualisation • Solo diving philosophy • Breathing techniques • Stress management • Continuous training • Complacency

9. Lecture/Course contents • Physics • Physiology • Decompression • Equipment • Gas management • Dive & Operational Planning • Survival • Dive planning workshop • Theory test • Dives

10. Theory Exam & Dives • Theory Exam • Open Book • 75 minutes • Pass mark 80% • Must pass before doing open-water dives • Open-Water Dives • 4 dives • Minimum 100 min total bottom time • Maximum 2 dives per day • Configured for ERN diving • Manifold twin –sets & two side mounts • Demonstrate competent dive practice

11. Dives Format - Dive 1 • Max depth 10m • Practice skills & refine kit configuration • Gas shut-downs, static and on the swim. • Navigational techniques – including belaying a line. • Minimum of two SMB deployments (one mid-water) which must be competently performed. • Follow a line without a mask. • With original mask removed from the face, retrieve spare mask and re-fit. • Correct use of run-time method of dive planning. • Out of air drills and swim 20m using buddy’s gas source with no mask. • Correct gas switching. • Removal of side-mount, exchange with buddy and attach buddy’s side-mount in its place.

12. Dives Format - Dive 2 • Depth 20 – 30m • Differing mixes in stage cylinders • Minimum of two SMB deployments (one mid-water) which must be competently performed. • Gas shut-downs, static and on the swim. • Navigational techniques – including belaying a line. • Correct use of run-time method of dive planning. • Correct gas switching. • Removal of side-mount, exchange with buddy and attach buddy’s side-mount in its place. • Use of decompression station.

13. Dives Format - Dive 3 • Depth 20 – 30m • Differing mixes in stage cylinders • Gas shut-downs, static and on the swim. • Navigational techniques – including belaying a line. • Correct use of run-time method of dive planning. • Correct gas switching. • Deployment of a second SMB from 6m stop to simulate signalling a low gas situation to the surface. • Removal of side-mount, exchange with buddy and attach buddy’s side-mount in its place. Performed at 6m deco bar. • Use of decompression station and jon-line.

14. Dives Format - Dive 4 • Depth 45 – 50m • Minimum 15 min stage decompression • Differing mixes in stage cylinders • Navigational techniques – including belaying a line. • Correct use of run-time method of dive planning. • Correct gas switching. • Use of decompression station.

15. Notes • Overhead Environments • Decompression & Rebreathers • Quality Assurance & Safety • High quality equipment • Feedback • Under supervision of CFT ERN instructor

16. Summary • Course Aims • Personal equipment requirements • Recommended Equipment • Personal Approach to the course and ERN diving • Course Requirements

17. Questions?