Advanced Nitrox & Helitrox (TDI)

The Advanced Nitrox & Helitrox course is similar in nature to the Advanced Nitrox and Decompression Procedures course with all the same skills and a depth rating of 45meters but utilising enriched air nitrox and helium mixtures not exceeding 35% helium content or breathing less than 21% oxygen content.

TDI Technical Scuba Diving Courses from ScubaQuest

This will give the diver a benefit as it pertains to gas narcosis, allowing the diver to dive to depth but without the full impediment of narcosis. There are also some additional equipment configurations to discuss and an additional theory component to the course as it pertains to helium use.

The Advanced Nitrox & Helitrox course is the ideal training for diving in Scapa Flow and many of the UK’s coastal wrecks.

Please note: Advanced Nitrox and Helitrox can both be taken as standalone courses in their own right. Please contact us if this is something you are interested in.

ScubaQuest Review by James Rusby

Qualification Depth

45 meters maximum

Breathing gas mixtures not exceeding 35% helium or breathing less than 21% oxygen
Utilising up to 100% oxygen for accelerated decompression

The Advanced Nitrox & Helitrox 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 four days with a minimum of six dives, two dives below 30m.

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. 

While not a requirement, it is recommended that the course is conducted using a twinset.

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/He 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

Technical Diving Crossovers (TDI)

Read More

CCR Helitrox Decompression Procedures (TDI)

Read More

CCR Air Diluent Decompression Procedures (TDI)

Read More

Trimix Technical Diver (TDI)

Read More

Extended Range Technical Diver (TDI)

Read More

Advanced Nitrox & Helitrox (TDI)

Read More

Advanced Nitrox & Decompression Procedures (TDI)

Read More

CCR Air Diluent Diver (TDI)

Read More

Introduction to Technical Diving (TDI)

Read More
Scuba Diving International (SDI)
TDI (Technical Diving International)
First Response Training International
Emergency First Response
SDI TDI Professional Development Centre
Development Centre
SDI TDI Professional Development Centre
© 2018 - 2022 ScubaQuest Ltd. All rights reserved | Built by JERO
© 2018-22 ScubaQuest Ltd. All rights reserved
Built by Studio JERO
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram