Highly versatile, the Petrel EXT can operate in the following modes:
Connected to rebreather:
Download it here: http://www.shearwaterresearch.com/downloads/petrel-firmware-downloads/
This is a recommended update for all Petrel users. Firmware V11 adds new features and fixes minor bugs. Please see the release notes for details.
New features include user configurable center row displays and a dive end time (DET) display.
For example, if the time-of-day is 2:45pm and the TTS is 45 minutes, then the DET is 3:30pm