PSAI Advanced Nitrox Diver is where recreational nitrox habits grow into technical decompression diving. You learn to use enriched air across the EAN22 through 100% oxygen range, including decompression gases, within PSAI Advanced Nitrox limits. That means staged decompression procedures, rigorous gas analysis and planning that accounts for both bottom time and oxygen exposure on every stop.
Centres run a multi-day technical programme with classroom theory and open water training dives. Schedules vary, but expect substantial homework on physics, maths and decompression fundamentals before you kit up with stage cylinders. Your instructor reviews your logbook and prior training against the technical foundation PSAI expects.
If you hold PSAI Nitrox Diver or PADI Enriched Air, you already know analysis and oxygen limits at recreational blends. Advanced Nitrox adds decompression discipline, higher oxygen fractions and the mental load of carrying multiple gases. Stage bottle swaps feel clumsy until they are boring. That is the point. Build logged deco time after certification before chasing the next card.
Advanced Nitrox Diver is assessed through theory, planning exercises and open water technical dives. Your instructor signs off when decompression procedures, gas switches and analysis habits meet PSAI standards.
Quick answers about this qualification. For anything else, use live chat or browse bookable activities below.
Find activitiesIt is PSAI's technical nitrox certification covering enriched air from EAN22 to 100% oxygen, including decompression procedures. You build staged decompression skills with rigorous gas planning and analysis.
It sits above recreational Nitrox Diver and feeds into deeper technical programmes such as Extended Range and trimix pathways.
You need PSAI Nitrox Diver or an equivalent enriched-air certification, plus open water diver status with a technical foundation your instructor accepts. Centres assess logged experience before enrolment.
Leave a comment when you book with your cards, approximate dive count and any prior deco training so the centre can confirm you are ready.
Recreational nitrox tops out at 40% oxygen for no-stop diving within oxygen limits. Advanced Nitrox adds staged decompression, oxygen-rich decompression gases up to 100% and the equipment to carry multiple analysed fills.
The maths and consequences of mistakes get more serious. That is intentional, not a reason to rush the prerequisites.
PSAI describes a multi-day technical programme with theory and open water dives. Many centres spread training across a long weekend block or a full week depending on weather and student readiness.
Technical courses slip when conditions are poor. Build buffer days into travel plans rather than assuming a fixed finish date.
Within PSAI Advanced Nitrox limits you may use enriched air up to 100% oxygen, including decompression gases, as taught on the course. Bottom mixes and deco gases depend on your instructor sign-off and logged progression.
Helium-based bottom mixes belong in trimix training, not this nitrox-focused programme.
Technical decompression diving typically uses twin-set, sidemount or a configuration your centre teaches for staged gas carrying. Confirm required kit with the listing before you travel.
Renting technical kit is common on first courses. Owning well-fitted harness and regulators you trust helps on long deco hangs.
Most technical agencies teach a similar progression from recreational nitrox through decompression procedures. PSAI emphasises its planning charts, worksheets and conservative gas management culture.
If you hold PADI Enriched Air only, you still need a full technical nitrox-deco programme rather than assuming crossover credit without centre verification.
Expect long days, heavy kit, detailed planning and cold deco hangs if you train in UK water. The skills are learnable with patience and a solid nitrox foundation.
Divers who arrive underprepared on prerequisites or gas analysis habits make the course harder than it needs to be. Build recreational nitrox experience first.
Many students progress to PSAI Extended Range Diver for deeper air-back-gas profiles, or toward trimix programmes when logged experience supports the jump.
Advanced Nitrox also suits divers who want disciplined decompression skills without immediately pursuing extreme depth.
Personal dive computer with multi-gas modes, wet notes or slate, and exposure protection suited to long stops. Centres provide or rent stage rigs depending on the listing.
Leave a comment when you book about your current kit configuration so the centre can confirm compatibility with their teaching setup.
adventuro lists PSAI technical centres offering Advanced Nitrox Diver on coasts and inland sites suited to staged decompression training. Compare gas fees, boat access and minimum logbook requirements before you pay.
Training in cooler water builds tolerance for real-world deco conditions early. Warmer venues may progress faster but still demand the same planning discipline.
From £ 90
Highlands & Islands, United Kingdom
From £ 345
Northumberland and Tyne and Wear, United Kingdom
From £ 250
East Anglia, United Kingdom