Photo by Teemu Virtanen · CC BY-SA 3.0
Extended Range
Extended Range pushes staged decompression diving further than the base Decompression Procedures course, requiring dives past 33m/100ft with at least 2 dives deeper than 40m/130ft on a single decompression gas. It teaches more advanced gas planning, longer runtimes, and the added risk management that comes with deeper no-mistakes diving. It's aimed at divers who've already got Decompression Procedures under their belt and want to extend their working depth before moving into trimix. It sits between Decompression Procedures and Trimix Diver in TDI's technical progression — the natural next step once a diver is comfortable running shorter deco dives. It's open-circuit diving with doubles or sidemount and a dedicated decompression gas, and it opens the door to Advanced Trimix and deeper wreck/cave specialties.
Centres that teach this course
25 dive centres in the directory publish a price for this exact certification, checked Sep 2026. Each centre's own wording is shown beneath its name. Ranges cover whole-course prices only — where a centre charges per day or per dive, its rate is listed separately below, since a daily figure is not comparable with a course total.
- €705total
- €850total
- €800total
- €550total
- €715total
- €575total
- €600total
- €690total
- $950total
- $1,400total
- $1,600total
Charged by the day or dive rather than as a course price:
- $325per day
- Under The JungleMexicoExtended Rangeprivate$345/day→ $1,380 for the 4-day minimumper diver in a group$295/day→ $1,180 for the 4-day minimum each$345per day
- Cave AdventurersUnited StatesExtended RangePrivate class$450/day→ $1,350 for the 3-day minimumGroup class$350/day→ $1,050 for the 3-day minimum each$450per day
- THB 25,000total
- THB 44,900total
- THB 44,900total
- Krabi Scuba Club (by BB Marine)ThailandTDI Extended Range / IANTD Technical Diverone price, several agenciesTHB 35,000total
- Phuket Scuba Club (by BB Marine)ThailandTDI Extended Range / IANTD Technical Diverone price, several agenciesTHB 35,000total
- Pattaya Scuba Club (by BB Marine)ThailandTDI Extended Range / IANTD Technical Diverone price, several agenciesTHB 35,000total
- IDR 20,700,000total
- IDR 15,000,000total
- IDR 12,500,000total
- IDR 12,600,000total
- ₱54,000total
Same training under a different agency
17 centres
A separate set of centres, teaching Extended Range under a different agency. These are not the same certification — the standards and the card differ — but they cover the same depth and scope, which is why centres price them alike. Every row here names whose rating it is, and none of them is counted above.
- €800total
- €800total
- €850total
- €500total
- €520total
- €640total
Charged by the day or dive rather than as a course price:
- €300per day
- IDR 20,700,000total
- IDR 15,000,000total
- IDR 17,500,000total
- IDR 10,000,000total
- IDR 15,000,000total
- IDR 17,500,000total
- THB 30,000total
- THB 39,900total
- THB 35,000total
- THB 30,000total
- $990total
Charged by the day or dive rather than as a course price:
- $1,000per person
- ₱32,950total
- MX$12,000total
Same tier, agency not stated
6 centres
These centres publish a price for Extended Range, but their own wording does not say which agency's certification it buys — many teach several and name the card only once you enquire, and some price one course for either agency. The figure is comparable; the certification is not identified, so we do not guess at one.
- €850total
- €900total
- €650total
Charged by the day or dive rather than as a course price:
- €200per day
- THB 29,000total
- IDR 12,000,000total
These prices are not like-for-like. Two centres can charge very differently for the same certification because they include different things. One price may cover twinsets, stages, deco gas and cylinder rental for every training dive, a dedicated classroom for the theory, boat or transport to the site, and the agency's registration and materials; another may be tuition only, with all of that charged separately — or the other way round, with a centre bundling in extras the first leaves out. Class size, whether the course is one-to-one, and how many days are allowed for it move the figure too. Check what each centre's price includes before comparing them, and confirm with the centre before booking.
Consumables are usually extra. Sorb, helium, O₂ and other fills, park and cenote fees, certification fees and rental are commonly charged on top.
Packages combining several certifications, upgrades from an existing one, and open-ended day rates are excluded — none of them is the standalone price of this course, and including them would move the figures away from what a new student can actually book.
Prerequisites
TDI Advanced Nitrox Diver and Decompression Procedures Diver certifications, minimum 100 logged dives, minimum age 18.
Instructors Teaching This Course
Egypt
Philippines
United States
Mexico
Thailand
Indonesia
Dive Centres Offering This Course
Mexico
United States
Philippines
Egypt
Thailand
Indonesia
We're still building out the directory country by country, so this list isn't every instructor or dive centre teaching it in the world — more locations are coming soon.
Common questions about TDI Extended Range
How much does TDI Extended Range cost?
Published prices for TDI Extended Range range across 22 centres in the TecDiveTools directory — roughly US$600 to US$1,600 at current exchange rates. In each centre's own currency: €550–€850 (8 centres), THB 25,000–44,900 (6 centres), IDR 12,500,000–20,700,000 (4 centres), $950–$1,600 (3 centres) and ₱54,000 (1 centre). 3 centres charge by the day instead, which is not comparable with a course total. Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.
How long does TDI Extended Range take?
Between 3 and 6 days, based on the durations 14 centres publish for it. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.
What are the prerequisites for TDI Extended Range?
TDI's standards require: TDI Advanced Nitrox Diver and Decompression Procedures Diver certifications, minimum 100 logged dives, minimum age 18.
What is the minimum age for TDI Extended Range?
TDI's standards state: Minimum age 18.
How many dives do I need before starting TDI Extended Range?
TDI's standards state: Minimum 100 logged dives.
What is the equivalent of TDI Extended Range in other agencies?
At the same tier in TecDiveTools' cross-agency comparison: RAID Advanced Decompression, RAID Extended Decompression, PSAI Extended Range Nitrox, PADI TecRec Tec 50 and IANTD Technical Diver. They cover comparable training, but each agency sets its own standards, depth limits and certification card, so they are comparable rather than interchangeable — check which one your next course accepts.
What course comes after TDI Extended Range?
The next step in TDI's progression is TDI Trimix.
Where can I take TDI Extended Range?
127 dive centres and 237 instructors in the TecDiveTools directory teach TDI Extended Range across 7 countries, most in Egypt, the Philippines, the United States and Mexico. Each is listed further up this page.
Does the price of TDI Extended Range include gas and equipment?
Not always — it varies by centre. Certification fees, equipment rental and boat or site fees are commonly charged on top of the course price. Each centre's price list on TecDiveTools shows what it notes as included.