| Depth Range Ascent Rate Limit 0-20 ft (0-5.9 m) 26 ft (8m) per minute 21 to 59 ft (6 to 17.9 m) 39 ft (12m) per minute 60 ft (18m) or deeper 52 ft (16m) per minute. If you exceed the fastest allowable ascent rate, the Quantum flashes the SLOW symbol, sounds an audible alarm, |