ANDI Tri-Mix Exploration Diver (TMD) (L5)

Course Overview & Training Objectives

ANDI Level 5 Tri-Mix Exploration Diver (TMD) is the pinnacle open-circuit exploration certification, certifying divers to depths up to 100m (330ft). The program covers hypoxic bottom gas physiology, high-pressure nervous syndrome (HPNS) prevention, and multi-stage decompression architecture. Divers develop the operational discipline needed to manage travel gas changes, gas switches under task-loading, and catastrophic equipment failure backups.

Operational Envelope

• Max Depth: 100m (330ft)
• Decompression: Unlimited (gas limited)
• Breathing Gases: Hypoxic Trimix bottom gas (O2 down to 10%), travel gas, and 3+ stage cylinders with SafeAir and 100% O2
• Equipment Rig: Double + Multiple Stages

Course Structure & Training Requirements

• Course Duration: 5 to 7 Days
• Required Training Dives: 6 in-water dives
• Classroom & Theory: 20 hours instruction

Entry Gates & Prerequisites

TTM/ERD