This TDI course provides training and experience required to competently utilize air for dives up to 180 fsw that require staged decompression, utilizing nitrox mixtures or oxygen during decompression.
The objective of the course is to train divers in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 180 fsw and utilizing nitrox mixtures or oxygen for staged decompression.
Prerequisites:
1. Minimum age 18.
2. Minimum of 100 logged dives, of which 25 must be deeper than 100 fsw, or the equivalent at the discretion of the instructor.
Certification as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver (or equivalents) are required.
Course Minimums:
1. Classroom/briefings – 8 hours
2. Open Water Dives – 6 with a minimum accumulated time of 100 minutes. All dives must be deeper than 100 fsw with four dives deeper than 130 fsw. (No more than 2 dives may be credited from previous TDI course training).
Required Equipment:
1. Bottom Mix cylinders: Cylinder volume appropriate for planned dive and student gas consumption and reserve. Dual outlet valve, double manifold with isolator valve. Cylinders labeled in accordance with TDI standards.
2. Travel Mix cylinder (if used) - Cylinder volume appropriate for planned dive and student gas consumption. Labeled in accordance with TDI standards.
3.Decompression Mix: Cylinder volume appropriate for planned dive and student gas consumption. Labeled in accordance with TDI Standards.
4. Regulators: Primary and primary redundant required on all bottom mix cylinders. SPGs are required on all primary, bottom mix and deco cylinders. A contingency use long hose (7') on a primary second stage should be designated and appropriately rigged to facilitate air sharing at depth if necessary.
5. BCDs: Adequate for equipment configuration. Plate and harness preferred
6. Redundant Depth and timing devices: Air decompression computers allowed for use as depth and bottom timing device but you will still need another backup system for determining depth and time.
7.Redundant light system depending on lighting conditions.
8. Jon-line or other rigging lines as dictated by site conditions.
9. Ascent Reel Min 140' with Lift Bag/Surface marker Buoy. Minimum 50lb lift bag required.
10. Exposure suit adequate for local environment. Dry suit preferred due to longer exposure while on deco stops.
11. 2 line cutting devices.
12. Underwater Slates (2)
