PSAI Extended Range Nitrox Diver trains you to conduct staged decompression dives beyond 45 metres but not exceeding 55 metres, using air as your primary back gas and nitrox for decompression. That depth band is where many deep wrecks and walls live, and where casual recreational habits stop being enough. You need disciplined gas management, redundant equipment thinking and calm execution on decompression stops.
Centres typically run four to five days of classroom work, workshops and multiple open water training dives. You study extended range dive planning, emergency protocols and staged decompression for depth and longer bottom times. Your instructor confirms you hold the nitrox and staged decompression foundation PSAI expects before you commit.
This is not a shortcut past Advanced Nitrox Diver. It assumes you already speak the language of analysed deco gases and oxygen exposure. Extended range adds depth, bottom time and the sort of problem management that only feels routine after cheerful repetition in controlled conditions.
Extended Range Diver is assessed through theory, dive planning and practical open water performance on staged decompression dives. Your instructor signs off when you meet PSAI standards to 55 m.
Quick answers about this qualification. For anything else, use live chat or browse bookable activities below.
Find activitiesIt is PSAI's extended range nitrox programme for staged decompression dives from below 45 m up to 55 m / 180 ft. You use air as back gas and nitrox for decompression within trained limits.
It targets divers who want structured depth beyond recreational cards without jumping straight to trimix.
You need an experienced technical diving background with nitrox and staged decompression training. Your centre confirms prerequisites against PSAI standards and your logbook.
Leave a comment when you book with your certifications and approximate number of decompression dives so the team can advise honestly.
PSAI Extended Range Nitrox Diver qualifies staged decompression dives to 55 m / 180 ft with air back gas and nitrox decompression gases, within the limits of your training and ongoing experience.
Deeper helium mixes require Trimix Fundamentals or equivalent progression.
Typically four to five days of classroom, workshops and open water training dives. Some centres add buffer days for weather or extra coaching.
Technical courses consume surface time for gas fills and debriefs. Expect full days, not casual holiday diving hours.
This programme teaches extended range with air bottom gas and nitrox deco gases inside a defined depth ceiling. Trimix adds helium for narcosis and gas density management at greater depths.
Extended range is a deliberate step before helium programmes for divers building depth gradually.
All decompression diving carries elevated risk compared with recreational no-stop diving. Training focuses on planning discipline, analysed gases, team protocols and conservative profiles.
Stay within certification limits and build experience slowly after the card. Depth records are not the point.
Twin-set or sidemount, stage cylinders for decompression gases, technical computer with multi-gas modes and exposure protection for long stops. Centres may rent rigs; confirm before travel.
Redundant gas and adequate bailout planning are course themes, not optional extras.
Advanced Nitrox Diver builds decompression skills with high-oxygen gases. Extended Range applies that foundation to deeper air-back-gas profiles and longer bottom times toward 55 m.
Most students complete advanced nitrox and substantial logged deco before enrolling here.
PADI Tec and PSAI technical pathways share similar ideas: staged deco, gas analysis and incremental depth progression. Agency labels differ; skills and conservatism matter more than the logo on your old cards.
Bring your full logbook and certifications for crossover assessment rather than assuming automatic credit.
Long stops expose buoyancy weaknesses that shallow diving hides. Instructors add practice and may repeat dives before signing off. Extra coaching is normal, not a failure.
Leave a comment when you book if you want a centre known for patient technical instruction.
adventuro lists PSAI technical centres with sites suited to extended range training. Compare gas fees, boat logistics and minimum experience requirements on each listing.
UK quarries and North Sea coasts build cold-water deco habits. Warmer destinations may offer clearer water but the same planning standards.
