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Adds configurable mini displays allowing up to 3 displays in the area normally used for 1.
Supports up to 4 wireless AI tanks, recommending Swift transmitter for >2 tanks.
Adds sidemount mode with reminder indicators, pooled gas calculations, and RTR display.
Makes DCIEM decompression model available for specific dive modes, requires unlock fee.
Adds Bailout CCR PPO2 monitoring option (BO CCR) for CC/BO mode, using internal setpoint for calculations.
Updates Gradient Factor rules to GF_Low <= GF_High, GF_High > 30, GF_Low > 10.
Critical update for Petrel 2 users, recommended for those using v81.
Fixes an issue causing incorrect decompression stop depth display after battery change on Petrel 2 v81.
Adds features previously released with Peregrine v78 to non-Peregrine models.
Important notice for OC REC mode users to confirm PPO2 MOD value after updating.
Adds support for Peregrine hardware.
Introduces new single-gas modes: AIR (21% O2), Nitrox (21-40% O2), and 3 GasNX (renamed OC Rec).
Adds user-configurable alerts that provide warnings and change display to yellow when limits are exceeded.
Removes "Max Depth" setting from Adv Config 1 in OC Rec mode, making MOD purely a PPO2 function.
Changes how OC MOD PPO2 and Deco PPO2 limits are applied, affecting MOD of gas and warning levels.
Adds Surface GF display showing gradient factor if surfacing immediately, configurable on main screen.
Allows log sampling rate to be set to 2, 5, or 10 seconds, affecting storage and download times.
Allows setting customized gradient factors in OC Rec mode, previously only fixed sets were available.
Changes OC Tec PPO2 limits, replacing "OC Max PPO2" with "OC MOD PPO2" and "OC Deco PPO2".
Adds a new info row for decompression data including SurfGF, DET, and Δ+5.
Adds automatic detection of depth sensor model for NERD 2, allowing a single firmware build for both sensors.
Adds support for the new improved depth sensor for NERD 2; v54 is only for hardware with the new sensor.
Incorporates features from NERD 2 v46 release, including the Stack Timer (CO2 scrubber duration timer).
Adds support for CO2 sensors, reporting PPCO2 in millibar and alarming over 5 mbar.
NDL Planner now includes descent time to bottom depth, making numbers slightly longer and consistent with Deco Planner.
Adds support for the NERD 2 hardware.
Adds support for built-in li-ion charging and battery gauge for NERD 2.
Adds "Stack Timer" feature for CO2 scrubber duration timing, with user-defined reset and alarms.
Fixes a problem at high altitude where unit used sea level pressure, causing overly conservative decompression.
Adds support for the X-CCR rebreather model.
Adds support for the Air Integration (AI) feature for Perdix AI.
Corrects an O2 offset problem affecting Petrel 2 analog PPO2 monitoring models.
Renames the 'OC/CC' mode to 'CC/BO' to clarify its purpose for closed circuit dives with open circuit bailout.
Displays gas in flashing red when PPO2 is outside safe breathing range (min/max PPO2 setting).
Adds Delta+5 as an option for configurable rows, showing TTS difference for 5 extra minutes at current depth.
Adds support for changing settings on peripheral boards (e.g., Solenoid Speed on SOLO) via the "Bus Devices" page.
Backs up deco tissues and clock into permanent memory every 16 seconds for Perdix.
Adds support for Perdix hardware and a new display driver for the Perdix.
Adds a mini compass as an optional display on the center row for the Petrel 2.
Adds Timer (stopwatch) display as an option on configurable center or bottom rows for Petrel 2.
Implements a more robust method for storing settings to protect against corruption from battery failure.
Improves reliability of surface pressure determination at high altitudes, regardless of unit turn-on method.
Sets OC Rec (Nitrox) low PPO2 warning to a fixed 0.16 (previously 0.19) to prevent altitude warnings.
Fixes an issue where some VPM-B dives were calculated as more conservative than intended.
Fixes an rMS roll-under bug that occurred if connection was lost during dive countdown.
If an rMS probe fails its power-up test, the entire rMS system locks out until power cycle.
Changes auto setpoint switching behavior for more controlled, intuitive, and manual-switch-friendly operation.
Enforces switch down depth to be at least 20ft (6m) less than switch up depth to prevent oscillations.
General| Operating Depth | Up to 120 meters |
|---|---|
| Depth Rating | 120 meters |
| Housing Material | Polycarbonate |
| Weight | 200 grams |
| Dimensions | 120 x 80 x 40 mm |
| Connectivity | USB |
| Weight (with battery) | 220 grams |
| Number of Gases | 5 |
| Dive Modes | Gauge |
| Display | Backlit LCD |
| Algorithm | Buhlmann ZHL-16C |
| Water Type | Fresh or Saltwater |
| Screen Resolution | 320 x 240 pixels |
