The TDI Trimix course provides a safer means for deep water exploration, as deep as 60m/200ft, There is a strong emphasis on safety and skill development, since at these depths, any small problems that may occur need to be solved correctly, and much faster than you will find is necessary at 40m/130ft or shallower. Experience, familiarity with procedures and equipment, and comfort, are the key to having fun and diving safely. The course certifies divers to use normoxic trimixes (meaning the gas can safely be breathed at the surface), and two decompression gases are normally carried at this level of diving.
This training is an alternative to TDI Extended Range Diver, which is of a similar level but is air based. You don't have to do both courses, just one or the other. It is prerequisite to the TDI Advanced Trimix course. TDI eLearning is available - please contact us for details.
So now you can hold a certification to 60m/200ft. What does this offer? This diving range opens the door to many new dives sites, and while deep, is still a depth range that still allows a good balance of bottom time, easily up to half an hour, without decompression becoming too long.
In Puerto Galera itself this course will get you to some of the most beautiful and atmospheric places on our outer reef. Sweetlips Corner, Markus Cave, The Fishbowl, and the awe inspiring Secret Reef, or Blackfish Pinnacle on Verde Island. Check out our Dive Sites map for more. Interested in wreck diving? Consider that ships rarely sink in shallow water, nor last long if they do. For the Trimix Diver an example of a "must see" is the WWII British aircraft carrier HMS Hermes, sunk off Eastern Sri Lanka at just over 50m. Our trips there have provided some of our finest dives. At this level, your possibilities are endless!
Prerequisites
Program Content and Limits
In the TDI Trimix Diver course you will expand on what you learned during Advanced Nitrox & Deco Procedures. Dive planning becomes more involved due to depth and loss of gas scenarios that need to be considered, and exposures are higher. Further fine tuning of equipment may be required to make sure it is really helping you in the water. During the classwork, land drills and in water you will learn about :
Note: As with other TDI programs, the diver must complete and pass the written examination, complete all open water requirements efficiently and safely, and demonstrate mature and sound judgement in dive planning and execution in order to be certified.
You will find details of what is included and not included across all TDI courses on the Overview page.
The TDI Trimix course is normally taught in double tanks although Sidemount is an option for those already certified. Two decompression tanks are generally used. Either a printed manual, or eLearning, are available for this course.
In the TDI progression the diver has a choice of taking either Extended Range Diver or Trimix Diver. Being air based, Extended Range is depth limited at 54m/180ft and is an overall less well rounded certification for deep diving. However if you prefer it, time taken is the same. During the Trimix course you can expect a helium cost of roughly $250-300/Php12,000-15,000, not applicable in Extended Range.