TDI Deco Procedures

Decompression gas choices

Tables vs. personal dive computers

Emergency and contingency planning

Equipment selection

Pre-dive checks and drills

Stress analysis and mitigation

Following a decompression schedule

Gas switching

Team awareness and communication

SMB/lift bag deployment

Land Drills-Selection and preparation of equipment suitable for soft overhead environment

Land Drills-Conduct team oriented drills, buddy checks, for lift bag deployment

Land Drills-Conduct team oriented drills, buddy checks, for gas switching procedures

Land Drills-Gas matching among buddy team

Land Drills-Demonstrate familiarity with basic hand signals

Land Drills-Demonstrate adequate pre-dive planning

Pre-dive Drills-Use START* before every dive

Pre-dive Drills-Stress analysis and mitigation

In-water Drills-Demonstrate buoyancy control; ability to hover at fixed position in water column without moving hands or feet

In-water Drills-Show good awareness of buddy and other team members through communications, proximity and team oriented dive practices

In-water Drills-Demonstrate comfort swimming on surface and at depth carrying single decompression stage cylinder

In-water Drills-Demonstrate ability to drop and retrieve single decompression cylinder while maintaining position in the water column

In-water Drills-Demonstrate ability to deploy a lift bag solo and as member of team

In-water Drills-Demonstrate controlled / staged ascent on lift bag / emergency ascent line (lost ascent line)

In-water Drills-Remove and replace mask (deploy backup mask)

In-water Drills-Demonstrate appropriate reaction to gas hemorrhage from manifold or first stage, SPG and primary regulator

In-water Drills-React to BCD inflator malfunction; disconnect LP hose, dump gas and orally inflate BCD/Wing to neutral buoyancy

In-water Drills-Demonstrate ability to confirm gas switch(es) at depth with buddy/team members

In-water Drills-Buddy breathing decompression gas for at least 1 minute

In-water Drills-Demonstrate appropriate reaction to simulated free-flowing decompression regulator

In-water Drills-Demonstrate appropriate modifications to deco schedule in decompression emergency (over time, over depth) (to be simulated)

In-water Drills-Demonstrate tired diver tow at depth and on surface, 30 metres / 100 feet lateral each

In-water Drills-Complete a horizontal breath hold swim at depth for 15 metres / 45 feet

In-water Drills-Properly execute the planned dive within all pre-determined limits

In-water Drills-Contingency situations and problem solving, as appropriate by instructor

In-water Drills-A safety stop of at least 3 minutes shall be conducted on all nodecompression dives and proper staged decompression stops whenever and wherever mandated.

In-water Drills-Demonstrate (simulated) emergency gas sharing at a stationary depth not to exceed 30 metres / 100 feet

In-water Drills-Demonstrate emergency deployment of a backup regulator or bail-out scuba system containing bottom mix at a depth not exceeding 30 metres / 100 feet

In-water Drills-Demonstrate the proper deployment, management and use of the bottom mix, decompression mix and travel mix, if used

Minimum age 18

Minimum certification of SDI Advanced Adventure Diver , Advanced<br /> Diver, or equivalent

Provide proof of 25 logged open water dives