DSAT Tec 40 course introduces divers to limited decompression within accepted recreational depth limits. This course standard allows the diver to utilize a minor variation from the standard recreational “kit”. We do however recommend the utilization of the full Tec set up (as stated below) and encourage the student to continue to Tec 45.


Course overview

Use decompression software and dive computers to plan and make decompression dives with not more than 10 minutes of total decompression and not deeper than 130ft.

Use a single cylinder of decompression gas up to 50 percent oxygen to add conservatism to the required decompression.



3-4 Days of diving (pool/confined open water) and 2-3 academic sessions and 1-2 gear configuration sessions.  


Depth Levels

  1. Dive one- 30ft max (shore dive at BHB)
  2. Dive two-60ft max (boat dive)
  3. Dive three- 90ft max (boat dive)
  4. Dive four- 130ft max (boat dive)


Equipment Requirements

Each diver will be required to have a complete set of personal dive equipment, including:

  • Diving cylinder with a minimum of 80 cubic feet with a dual-outlet valve on the cylinder ( .Y. or .H. valve) or 2 diving cylinders at least 80 cf tank
  • Primary & secondary regulators for doubles or single with appropriate valve
  • One with a seven foot hose for air sharing
  • One with an SPG
  • 1 deco tank with regulator, SPG & staging kit – properly labeled
  • Back-up deco gas as required
  • BC, back plate & harness (dual bladder or dual wings unless drysuit diving)
  • Dive computer (single or multi-gas), and either back-up computer or timer & depth gauge
  • Back-up decompression information (computer, dive tables, etc.)
  • Exposure protection (dry suit use requires prior dry suit diving experience)
  • Weight system (if needed)
  • Lights as necessary, including primary and backup
  • Jon line (for current diving environments)
  • Safety reel
  • (2) Slates, (1 wrist-type)
  • Compass
  • Z-knife and back-up cutting device
  • Spare clips, pull-ties, tank wrap bands & other rigging accessories
  • Back-up mask (optional)
  • Lift bag (100lbs min)