TDI Extended Range

This course provides training and experience required to competently utilize air for dives up to 55 metres that requires staged decompression, utilizing nitrox mixtures or oxygen during decompression. The objective of this course is to train divers in the proper techniques, equipment requirements, and hazards of deep air diving to a maximum of 55 metres utilizing nitrox mixtures or oxygen for staged decompression.


  • Have a minimum TDI Advanced Nitrox & TDI Decompression Procedures or Equivalent.
  • Show proof of a minimum 100 logged open water dives (25 deeper than 30m).


Day 1 / Theory Review and Dive #1

Day 2/ Dive #2 and Dive #3

Day 3/ Dive #4


450EUR for Course Cost + 60EUR for certification and e-learning cost + O2 cost, charged per L + Equipment Rental as required.

What's next?

  • TDI Trimix
  • TDI Advanced Trimix