Extended Range

SSI Extended Range

Life Begins at 45 m, Extend Your Range

We know, 40 metres is not enough. Some of the best wrecks and most amazing sites are below the recreational range, and you need technical diving gear as well as knowledge and skills to reach them.

The Extended Range program qualifies you to dive to 45 metres using nitrox mixes up to 100% oxygen for accelerated decompression times. You learn to plan and execute up to 25 minutes of decompression using one stage decompression gas. The programme can only be completed wearing specialized technical diving equipment. The training can be conducted using air or limited Trimix.

Koh Tao Tech Divers offers rental gear as part of the course, so you don't have to worry about getting all of the specialised equipment at first!

  • Who can take this course?

    • Minimum age 18 years
    • Deep Diver specialty diver
    • Enriched air nitrox diver
    • 50 or more dives
    • Have a current medical examamination for scuba diving and signed medical questionnaire
    • by a licensed medical practitioner not older than 1 year old


  • Duration

    • 5 days
  • Price includes

    • 6 dives
    • Lifetime (Diamond) Online & Offline access to the digital training materials
    • Equipment rental (excluding required equipment)
    • All gases
    • Digital certification
  • Course content

    • Basic diving knowledge review
    • Decompression theory
    • Technical diving procedures
    • Decompression planning and software
    • Equipment configuration workshop
    • Confined water training
    • 6 Open water training dives, (3 are real staged decompression dives)
  • Required equipment

    • 2 x Mask
    • Fins
    • Wetnotes/slates
    • 1 x dive computer and bottom timer (can be rented for 1.000 THB / day)
  • Online training

    Download the SSI appAll our XR courses include DIAMOND version

    • Lifetime Online & Offline access to the digital training materials
    • 2-year access to the Digital Divelog on the DiveSSI app
    • Downloadable to 3 different devicesDownload the SSI app

    Read more about SSI online training


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Give us a shout

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Mob. +66860699244 (Whatsapp) 

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Photo credits to Fat Fish Movies, Anna Kekkonen, Irena Stangierska, Fredrik Lindblad and Mikko Paasi

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