A note on modelsThe Petrel, Petrel 2, and Perdix share a common firmware base. Due to hardware differences not all features are available on all models. The following changes apply to all models unless otherwise noted.
Listing of changes in Firmware v34[row_fluid][span8]
CHANGEThe ‘OC/CC’ mode has been renamed to...
Fixed a bug in the Dive Planner where under some circumstances an ascent leg would incorrectly labeled as a descent leg and given zero time duration.
For those out there with this very enquiry, here is a step-by-step guide on how to determine if your unit is a Petrel or a Petrel 2 if you have a Stand Alone or Fischer