Extended Range Technical Diver (TDI)

As with the stepped philosophy that TDI training programmes implement, the Extended Range Technical Diver course serves to build on prior knowledge and skills to enhance your diving capabilities and leaves you qualified to take on more challenging and adventurous dives.

The Extended Range course will reinforce much of what has previously been learned, but will go into greater depth as well as introducing new concepts and ideas.

Scuba Diver with Rebreather

The course will provide the training and experience required to competently utilise air for dives down to a maximum of 55 meters, with staged decompression utilising up to 100% oxygen. The objective of the Extended Range programme is to train divers in the proper techniques, equipment requirements and hazards of deep air diving to this depth.

Qualification Depth

55 meters maximum using air as backgas.
Utilising up to 100% oxygen for accelerated decompression.

The Extended Range course is performance based.


The technical diver training, provided by ScubaQuest, will certify students to the recognised international standards provided by Technical Diving International (TDI).

TDI (Technical Diving International)


The course is completed over three days with a minimum of four dives below the depth of 30m, two of which will be below 40m with a minimum accumulated bottom time of 100 minutes.

Due to the nature of the course a flexible and personalised approach to the schedule will be applied based on the previous experience and pace of the student.


Technical Courses by their very nature require a tailored approach and in some cases the need to have a minimum number of students participating to make the course an effective learning experience.  Technical courses will be scheduled based on demand and customer requirements.

Please contact ScubaQuest to discuss scheduling options.


ScubaQuest Dive Centre
National Diving & Activity Centre
A48, Tidenham
NP16 7LQ

Map & Directions to ScubaQuest

Course Options

A complete equipment list will be issued as part of the booking process.  Where required, additional equipment can be supplied for the duration of the course at extra cost including twinset, regulators and stages.

ScubaQuest offers both traditional hard copy, classroom based theory and agency online learning packages.



The cost for the course includes agency manual, certification and use of O2 analyser.

Gas fills are excluded.

Please Note: For open water dives at The National Diving & Activity Centre (NDAC) there is a daily entry charge to the site, payable on the day by all students. This is NOT included in the course fee.  Please check the NDAC website for details.

Course Requirements & Notes

Book this Course

To book on this course or to discuss scheduling, please contact us using the form below, or phone us on 01291 798 118

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TDI (Technical Diving International)
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SDI TDI Professional Development Centre
Development Centre
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© 2018 - 2021 ScubaQuest Ltd. All rights reserved | Built by JERO
© 2018-21 ScubaQuest Ltd. All rights reserved
Built by Studio JERO
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