This course examines the theory, methods and procedures of planned stage decompression diving. This program is designed as a stand-alone course or it may be taught in conjunction with such TDI courses as Advanced Nitrox Course, Advanced Wreck Course, or Extended Range Course. The objective of this course is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of forty five (45) msw / one hundred fifty (150) fsw unless taught in conjunction with the Extended Range Course. The most common equipment requirements, gear set-up, and decompression techniques are presented. Students are permitted to utilize Enriched Air Nitrox mixes or oxygen for decompression provided the gas mix is within their current certification level.
Qualifications of Graduates
Upon successful completion of this course, graduates may engage in decompression diving activities without direct supervision so long as:
1. The diving activities approximate those of training.
2. The areas of activities approximate those of training.
3. Environmental conditions approximate those of training.
Upon successful completion of this course, graduates are qualified to enroll in:
1. TDI Advanced Nitrox Course.
2. TDI Extended Range Course.
3. TDI Advanced Wreck Course.
4. TDI Entry Level Trimix.
Student Pre-Requisites
1. Be a minimum age of eighteen (18).
2. Have a minimum certification of Open Water Diver.
3. Show proof of twenty five (25) logged open water dives.
Course Structure and Duration
Open Water Execution:
1. Four (4) dives are required.
2. If Advanced Nitrox is taught in conjunction with Decompression Procedures only a total of six (6) dives are required.
3. Only two (2) dives from Advanced Wreck course may be credited towards the total dives required.
Course Structure:
Required Equipment
The following are required for this course:
1. TDI Decompression Procedures Student Manual.
2. TDI Decompression Procedures PowerPoint.
The following equipment is required for each student:
1. Primary Cylinder(s). Cylinder volume appropriate for planned dive and student gas consumption.
2. Decompression Mix Cylinder(s)
A. Cylinder volume appropriate for the planned dive and student gas consumption with submersible pressure gauge.
B. Labeled in accordance with TDI Standards.
3. Depth gauge and automatic bottom timer and I or dive computer.
4. Regulator(s)
A. Primary and alternate 2nd stage required on all primary cylinders.
B. Submersible pressure gauges are required on all primary cylinders.
5. Buoyancy Compensator(s) adequate for equipment configuration.
6. Jon-line and other rigging lines as dictated by site conditions.
7. Ascent Reel with Lift Bag /Surface Marker Buoy.
A. Adequate for maximum planned depth.
B. Minimum of eleven (11) kg / twenty five (25) lb lift bag.
8. Oxygen Analyzer (may be supplied by the Instructor).
9. Exposure Suit adequate for the open water environment.
10. Underwater Slate.
