TDI Technical Diver Training

TDI technical training in York Region! YRS provides 4 awesome TDI courses – TDI Advanced Nitrox Diver, TDI Decompression Procedures Diver, TDI Extended Range Diver and TDI Technical Divemaster. The first two courses are typically done together, creating a diver that can do decompression diving with accelerated deco.

Contact us for more info or to sign up!

TDI Advanced Nitrox Diver
This course examines the use of EAN-21 through 100 percent oxygen for optimal mixes to a depth of 40 metres / 130 feet. The objective of this course is to train divers in the benefits, hazards and proper procedures for utilizing EAN-21 through 100 percent oxygen for dives not requiring staged decompression.

18 years old – 15 with parental consent unless done with Decompression Proceudres, then 18 minimum
TDI Nitrox diver or equivalent (PADI Nitrox Diver, etc.)
25 logged dives

TDI Decompression Procedures Diver
This course examines the theory, methods and procedures of planned stage decompression diving. This program is designed as a stand-alone course or it may be taught in conjunction with TDI Advanced Nitrox, Advanced Wreck, or Extended Range Course. The objective of this course is to train divers how to plan and conduct a standard staged decompression dive not exceeding a maximum depth of 45 metres / 150 feet unless taught in conjunction with the TDI Extended Range Course. The most common equipment requirements, equipment set-up and decompression techniques are presented. Students are permitted to utilize enriched air nitrox (EAN) mixes or oxygen for decompression provided the gas mix is within their current certification level.

18 years old
TDI Advanced Adventure Diver, Advanced Diver, or equivalent
25 logged dives

TDI Extended Range Diver

Certain areas of the world provide spectacular dives at depths deeper than 39 metres/130 feet but you may not have access (or very limited access) to helium. The TDI Extended Range course teaches you the proper techniques for utilizing compressed air as a breathing gas, and with a maximum depth of 55 metres/180 feet, so you don’t have to miss those dives! The TDI Extended Range Diver Course provides the training and experience necessary including proper techniques, equipment requirements, and hazards of deep air diving, to competently utilize air for dives up to 55 metres/180 feet that require staged decompression, using nitrox mixtures or oxygen during decompression.


Minimum age 18

Certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalent

Proof of a minimum of 100 logged dives, of which 25 must be deeper than 30 metres/100 feet

TDI Technical Divemaster
This program is designed to develop the skills and knowledge necessary for an individual to lead certified
technical divers in the open water environment.

1. Minimum age 18
2. Certified as an SDI Divemaster (equivalent ratings from other agencies are not accepted)
3. Provide copies of current CPR and first aid training
4. Have a current medical examination
5. Provide proof of 50 logged dives
6. Certified as technical diver for which they are applying as a divemaster in.

Advanced Nitrox and Decompression Procedures require a minimum of 4 dives each if done individually, or 6 total if done together, with a minimum of 100 minutes of bottom time. Classroom time will take roughly 2-4 weekends. Most diving will be at Centennial Beach and Shanty Bay (2 weekends). Final dives will be completed in Brockville on a tech weekend – dates to be confirmed.

Extended Range requires 4 dives, all below 100 feet, with 2 below 130 feet, and a minimum bottom time of 100 minutes. We’ll usually do the first 2 dives locally, and the second 2 in the St. Lawrence.

Gear Requirements (for two courses combined)
Double tanks – LP 95s are recommended. LP 85s recommended for Sidemount
Decompression Cylinder – AL 40s and LP 50s are recommended. (2 req. for Ext. Range)
2 dive computers (Primary and Secondary) or 1 dive computer and 1 depth gauge/bottom timer
2 DIN first stages and 2 second stages with 1 pressure gauge for back gas (2 for SM). One with 7’ hose.
1 DIN first stage and 1 second stage with 1 pressure gauge for deco cylinder. 40” hose. (2 sets req. for Ext. Range)
Plate and wing – double bladder recommended, min 60lbs lift per bladder. Drysuit required if using single bladder. Sidemount does not require the use of a backplate.
Line cutting device – 2 recommended
Jon line
Ascent reel and lift bag / DSMB
Minimum of 150’ of line
Minimum of 25 lbs lift
Backup reel – thumb spool – minimum 30’ line
Primary and Backup masks
Exposure protection (wetsuit, drysuit, gloves, boots, hood, etc.) – if using drysuit, the student should be experienced and comfortable in it
Slate or wetnotes
Fins – no split fins, spring straps preferred

2024 Pricing

Advanced Nitrox – $550
Decompression Procedures – $600

Extended Range – $600

3 Courses Combined – $1,600

Technical Divemaster – $350

Pricing includes all classroom and in-water training, as well as course materials.
Fills, gear, pool fees, quarry fees, parking, charter fees, etc. are not included.

Private classroom sessions and in-water sessions can be arranged for extra fees

Pricing is for training only and implies no guarantee of certification

Training is Purchased, Certification is Earned!

Divers may be excluded from training without refund if the diver shows an attitude or maturity not appropriate for technical diving. No refund will be given.

Students are required to attend all scheduled classes and dives. Failure to attend may cause extra costs.