Shearwater Perdix - Dive Planner

Operations Manual Perdix
Manual DocRev B
57
Dive Planner
Introduction
Calculates decompression profiles for simple dives.
In closed-circuit (CC) mode, also calculates open-circuit (OC) bail-out (BO).
Setup
Uses the current gases programmed into the Perdix, as well as the current GF
low/high settings. VPM-B dive planning is available on units with the optional
VPM-B unlock. Deco profile is computed for the current circuit mode (CC or OC).
On the surface
Enter the dive bottom depth, bottom time,
respiratory minute volume (RMV) and PPO2
(closed-circuit only).
Note: Residual tissue loading (and CNS%) from
recent dives will be used in calculating the profile.
During a dive
Computes the decompression profile assuming the ascent will begin
immediately. There are no settings to enter. (RMV is last used value)
Limitations
The Perdix Dive Planner is intended for simple dives.
Multi-level dives are not supported.
The Perdix Dive Planner makes the following assumptions:
Descent rate is 60ft/min (18m/min) and the ascent rate is 33ft/min (10m/min).
For OC, the gas in use will be the gas with the highest PPO2 less than 1.40
for the bottom gas, and 1.61 for deco gases (the deco gas max PPO2 can be
changed in the Adv Config 1 menu).
For CC, the diluent in use will be the gas with the highest PPO2 less than 1.05.
The planner will use the configured last stop depth.
For CC, the PPO2 is constant for the entire dive.
The RMV is the same while diving as during deco.
Dive Plan Setup
Change
Next
Enter Bottom Time
CC
in minutes
Min: 5
Max:180
Depth Time RMV PO2
150
1.3
.25
030