Surface Interval & Flying-After-Diving Timer
Live countdown to safe flying time after diving, based on DAN guidelines. Single dive, multi-day, or decompression — choose your profile.
Sources: DAN Flying After Diving Guidelines (2002, current as of 2024). These are minimums. Conservative practice: 24h after any diving day, longer if multiple deco dives. Cabin altitude pressure ≈ 2400 m equivalent is the risk driver — the same applies to mountain altitudes after diving.
Disclaimer: This tool is an educational aid. It is not a substitute for a personal dive computer, proper certification, or current medical advice. Plan dives conservatively and consult a dive professional when in doubt. Emergency: DAN Asia-Pacific +61-8-8212-9242.
Frequently asked questions
Does altitude after diving (driving to mountains) follow the same rules?
Yes — pressure reduction is the same risk. The DAN guidelines apply to any ascent above 300m elevation (cabin altitude or mountain road). The threshold isn't strict — risk grows continuously, but most operators consider 600m+ relevant.
Why does cruise altitude on the airline matter — isn't it just 2400m equivalent?
Yes, that's why the DAN rule is set as it is. Commercial cabin altitude is regulated to ~2400m (8000 ft) equivalent. That number, not cruise altitude, drives the off-gassing risk. Private aircraft without cabin pressurisation can be worse.
What if I have to fly sooner due to emergency travel?
Call DAN Asia-Pacific (+61-8-8212-9242) for case-specific consultation — they can advise based on your dive profile and risk factors. Free for any caller, member or not, for emergency consultation.
Does breathing pure oxygen at the airport reduce the wait?
Some research suggests it, but it's not in DAN guidelines as a substitute for time. Don't try to shortcut the interval with O2 unless you're under medical supervision.