Extended Range Course

Mon, 10/01/2007 - 11:03 - JK Skills JPEGFlickr Have you ever experienced something that appeared distant and out of reach to you and yet in time it became nothing more than a normal and everyday procedure? Perhaps like after your first driving lesson did you ever imagine doing seventy miles per hour in the fast lane of a motorway or driving through a city during rush hour? What about when you first donned scuba gear did you ever comprehend that later you might dive to forty meters along a reef wall in a strong current? As a regular diver the chances are that you have done this with relative ease and comfort.

So what happened between that first diving course and last week’s 45m decompression dive in the Thomas Canyon in Tiran? Very simply, you got there by increasing your limits and comfort levels sensibly with knowledge, training, experience and a good attitude… just like you have been doing all your life at work, on the road and maybe with your sports and hobbies too.

Technical diving is no different and we humans are curious creatures. It’s only natural to take a glance below and ask, ‘I wonder what is down there’. You cannot often ‘see’ depth. Water looks, feels and tastes much the same at any depth but what a deeper diver is more concerned with is the physiological changes that occur in his body and mind and also the additional equipment and planning considerations that deep air diving requires. So why not continue with your sensible approach to tech diving and enroll in TDI’s Extended Range Course for serious decompression divers wishing to reach areas not just underwater but within themselves too?


Here’s what you will learn:


  • How to dive deeper, safely
  • Advanced gas management techniques including accelerated decompression
  • How to handle multiple tasks and procedures simultaneously and stay in control
  • Superior and professional level underwater skill development
  • Planning techniques with computerized dive plan software (free to E.R. students)
  • How to dive in a four-tank, 3-gas configuration
  • Using multiple dive instruments and redundancy principals
  • Developing deep-water problem-solving skills
  • Understanding and practicing the use of additional technical accessory equipment
  • Acquiring a professional level knowledge of advanced dive theory
  • Emergency and assistance planning for the technical diving environment
  • Where all the best Extended Range dive sites are in the Red Sea
  • How to apply your training around the world and take advantage of your new skills


About the course


The Extended Range course is the final open water air diving course in the TDI curriculum before mixed-gas Trimix diving. Depth increases progressively from 45m in the TDI Decompression Procedures Course to 55m during Extended Range training. The difference in the actual type of dives between the Decompression Procedures course and the Extended Range course is minimal; descending and ascending at specific rates, gas switches on the fly, holding a series of stops in shallow water within a 1m range of the stop depth. The procedure of planning the dive and diving the plan, with a degree of clinical accuracy, is introduced during Advanced Nitrox and Decompression Procedures training. This skill is re-enforced during the Extended Range course with the addition of more kit, (an additional stage tank, quad configuration), one more gas switch and a higher degree of advanced dive planning. Accelerated decompression is planned now giving you the option to extend your bottom times even further and take advantage of the increased depth limit. Once forbidden sites such as Tiran’s, Thomas Canyon and the wreck of the Lara come into range for the first time!


Who can enroll on a TDI Extended Range Course?


  • You must be a minimum age of 18 years old
  • You must have a minimum certification level of TDI Advanced Nitrox and Decompression Procedures diver or equivalent
  • You must have a minimum of 100 logged dives
  • You should possess the relevant level of health and fitness for scuba diving
  • The course duration is 5 days