SSI Extended Range Trimix (45 Meter)

The SSI Extended Range Trimix program provides divers with the training necessary to independently plan and conduct limited decompression dives to a maximum depth of 45 meters, using decompression mixtures of up to 100% oxygen and specialized diving equipment and procedures, for a maximum accumulated decompression time of 25 minutes, with an equally-qualified dive buddy.

This course can be done in Twinset or Side Mount configuration.


  • Minimum Age: 18
  • Certification Prerequisites: Deep Diving, Enriched Air Nitrox (40%)
  • Have Logged at least 50 divers or be certified in Extended Range Nitrox Diving
  • Open Water Dives: 3 days
  • Maximum Training Depth: 45 meters
  • Suggested Duration: 18 hours

A complete Total Diving System with:

  • Twinset or Sidemount setup and
  • A single stage cylinder with regulator with:
    • Second stage with 1-2 meter hose and SPG. Oxygen cleaned as required
  • Backup computer in the event of a computer failure
  • 2 surface marker buoys (SMB)
  • 2 Spools or reel appropriate for the planned dive depth
  • 2 Cutting devices
  • Surface signaling device

We will complete an academic development classroom session. Here we will complete a full equipment configuration. You must complete a final exam with a passing score of 80%.
Open Water training days will be at dive center of your choice.

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