Normoxic Trimix

The generally accepted depth limit for air or Nitrox is 45 m/150 ft. Even at this, narcosis can be a serious problem. The solution is to add helium to the mix. This can all but eliminate the risks associated with narcosis — so much so that many divers start adding helium for any dive past 30 m/100 ft.

Normoxic Trimix is that in which the oxygen concentration is at least 18 percent. This eliminates the risks associated with hypoxic gas mixtures, which require the use of a travel gas in shallow water. You can use Normoxic Trimix as deep as 60 m/200 ft without exceeding a PO2 of 1.4 ATA.

If your goal is to take your diving to the next level, Trimix is the only safe and sane way to go.

Please note: Because the only north-Florida dive sites which offer the necessary depth for this training, you must be certified to the full Cave Diver level. Course prices do not include the cost of gas…and helium costs noticeably more than air or oxygen.


  • Be at least 18 years old
  • Have at least 100 logged dives
  • Be certified to the Advanced Nitrox/Deco Procedures Diver level or equivalent
  • Be certified to the full Cave Diver level or equivalent

Time frames

  • This course generally takes five days are requires at least 300 minutes of bottom time.

Required equipment

  • Mask and flat-bladed scuba fins with adjustable or spring heel straps
  • Adequate thermal protection for prolonged exposure to 21° C/72° F water
  • Sidemount or backmounted doubles harness
  • BC air cell with adequate lift for the cylinders used
  • Either backmounted doubles or two sidemount cylinders
  • Two separate regulator first and second stages
  • At least one intermediate deco bottle and reg of at least 11 liters/80 cubic feet
  • At least one oxygen deco bottle and reg of at least 5.5 liters/40 cubic feet
  • At least one mission-capable dive computer
  • Slate or wet notes
  • Two Z-knives or comparable cutting tools
  • One primary light
  • Two backup lights
  • Two safety reels/spools with a total of at least 50 m/150 ft of line

Be aware than any equipment you use must meet very specific requirements. Learn more…

Items such as cylinders and primary lights, which may be difficult to travel with, are available for rental. Be sure to alert us if you will need any of these.

 Choose your price

Know what you’re getting: Prices include instruction and eLearning fees. Bear in mind, the cost of eLearning, by itself, can be worth anywhere from $140 to $280 or more. Thus, a $640 course from us may actually cost the same as a $500 course from someone else if you have to pay for elearning separately.

Certification cards: We issue these only when earned. Simply taking part in a course does not guarantee certification. For cave courses, certification cards from multiple training agencies may be available. C-cards generally cost around $30 each, depending on agency. Your instructor can tell you more.

Normoxic Trimix Course

Take your diving ot the next level
$ 1,500 Single student price
  • Five days
  • 300+ minutes of bottom time

eLearning included at no extra charge

Computer-aided instruction is an integral part of nearly every course we teach. The Why? is simple: eLearning helps get our students in the water sooner and spend more time there. It’s why we include the cost of any applicable eLearning programs — usually a $140 value — in our courses at no extra charge. This translates directly into an extra day of in-water training. The value of that? Priceless.

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