TDI Cave Decompression Diver
Integrate decompression procedures into cave diving, manage staged decompression safely, and execute overhead environment decompression dives with precision
Duration
2 days, 4 dives
Max Depth
30m / 100ft; 40m / 130ft with helium-based gases
Level
Advanced Technical Overhead Environment
Next Step
TDI Cave Sidemount Diver / Expedition Diving
Overview
The TDI Cave Decompression Diver course trains cave divers to safely conduct planned decompression dives in overhead environments using oxygen for accelerated decompression.
This program combines:
- cave diving procedures,
- staged decompression,
- oxygen decompression strategy,
- and emergency management inside cave systems.
Training focuses on:
- decompression gas handling,
- staged ascent procedures,
- gas switching,
- decompression planning,
- and contingency management under overhead environment conditions.
At N9BO℠, this course is delivered as high-discipline technical cave training, emphasising procedural precision, team awareness, and decompression execution inside true cave environments.
Course Facts
- Course name: TDI Cave Decompression Diver
- Level: Technical cave diver
- Minimum prerequisites: Minimum age 18, TDI Nitrox Diver (or equivalent), TDI Full Cave Diver (or equivalent) OR currently enrolled in a TDI Full Cave Diver course
- Ratio: Maximum of 3 students per instructor (small groups recommended for quality training)
- Configuration: Full cave diving equipment with oxygen decompression cylinder and oxygen-clean regulator system
- Depth / environment: Maximum depth: 30m / 100ft; Up to 40m / 130ft with helium-based gases and END limits maintained, cave decompression diving only, Oxygen accelerated decompression procedures
- Format: Academic development + land drills + cave dives
- Duration: Typically completed in 2 days (Minimum 4 cave decompression dives)
What You’ll Learn
- Plan and execute cave decompression dives
- Analyse and label decompression cylinders
- Conduct staged decompression ascents, oxygen decompression procedures, gas switches inside cave environments
- Practice dropping and retrieving deco cylinders, team decompression management, back gas breaks
- Manage decompression obligations, oxygen exposure, gas reserves and contingencies
- Respond to lost decompression gas, regulator failures, ascent profile changes, cave decompression emergencies
Prerequisites
- Be at least 18 years old
- Hold TDI Nitrox Diver certification (or equivalent)
- Hold or be enrolled in TDI Full Cave Diver certification
- Be medically fit for diving
FAQ
This course teaches divers to conduct:
- Planned decompression dives
- Inside cave environments
- Using oxygen to accelerate decompression
while maintaining full cave diving procedures.
You must complete minimum 4 cave decompression dives over a minimum of 2 days
Training limits are:
- 30m / 100ft using standard gases
- Up to 40m / 130ft with helium-based gases and proper END management
You will learn:
- Cave decompression planning
- Gas switching procedures
- Deco cylinder management
- Oxygen decompression protocols
- Cave decompression emergency procedures
You are qualified to conduct planned decompression dives in cave environments, using oxygen accelerated decompression procedures within the limits of your training.
Ready to Add Decompression to Cave Diving?
Send us your certifications and cave diving experience. We’ll train you to execute decompression cave dives with precision, discipline, and operational control.
Go Pro with TDI Cave Decompression Instructor
Advance your overhead environment capability with decompression procedures, expedition cave planning, and advanced technical cave operations.
