The M1 RGBM computer is the most complete and easy to use dive computer available, for recreational and technical diving.
Modern look, controlled with just two pushbuttons. Powered with two 1.5 volt AAA alkaline batteries, which can be easily purchased and replaced by the user.
During the dive
• Current depth / maximum depth achieved (on request)
• Duration of the dive
• Safety stop
• Remaining no-decompression time at the current depth (no dec)
• Decompression stop times
• Total ascent time
• Water temperature (on request)
• Speed of ascent (as a percentage of the maximum permitted speed)
• Value for CNS O2 LIMIT % (in the case of Nitrox dives)
• Dive time in minutes and seconds (in bottom time mode)
On the surface
• Surface time
• Logbook facility for storing 50 dives in memory
• Profiles of the last 50 dives, at 20 second intervals (max 38 hours)
• Desaturation time display (desat)
• Time-to-fly display (no fly)
• Calendar and clock function
• Air temperature
• Self-diagnosis
• Scrolling of no-stop times for planning repetitive dives
• Dive simulator
Alarms
• No-decompression limit reached
• Excessively rapid ascent
• Omitted decompression stop
• Low battery
• Max permitted depth for the programmed PPO2 value (for Nitrox dives)
Main special functions
• Setting of Air/Nitrox/Bottom time programs
• Setting of percentage O2 from 21% to 50%, in increments of 1%
• Setting of PPO2 max from 1.2 to 1.6 bar
• History of the total number of dives, the deepest dive logged, the lowest temperature measured underwater, and the total hours of diving
• Display backlight, timed or permanently illuminated (using push-button controls)
• No loss of memory during battery change
• Function for clearing residual nitrogen memory
• Function for disabling audible alarms
• Fresh water / seawater setting (default fresh)
Technical Characteristics
• Mares-Wienke RGBM Algorithm with Deep Stops
• Powered by two 1.5 volt AAA batteries
• Quartz calendar clock
• Maximum operating depth: 150m/495 feet
• Maximum depth of first decompression stop: 24 m/2,438.40 cm
• Operating temperature: from -10 to +50°C (14/122 °F)
• Storage temperature: from -20 to +70°C (-4/+158 °F) | 
