POSEIDON SE7EN+ - Planning Your Dives with the M28

Poseidon SE7EN+ User Manual Appendix 3 Page 132
7. Planning your dives with the M28
The Apps/Planner is a tool intended for a last-minute check just before the dive or for checking
your next (repeated) dive at the dive site.
The Planner uses your current decompression status (tissue tensions) registered in the M28
together with your current settings, enabled gases in your gas conguration and the current
barometric pressure. RMV (Respiratory Minute Volume) is synchronized from the SE7EN
settings when SE7EN is connected to the M28.
In the Planner you select your planned maximum Dive depth, Dive time (bottom time + descent
time) and Surface interval, if any. The Planner will then calculate your dive prole and present
it visually together with a list of depth and time for each decompression stop, plus the calcu-
lated gas usage. Scroll down to see the Deco list and the calculated gas usage.
Note: If you plan a dive with no decompression stops, ensure that no decompression stops
are shown for your planned dive. If decompression stops are shown, re-plan your dive by
adjusting depth and/or time and/or surface interval.
When planning a rebreather dive you should always check the calculated gas usage in a
bailout scenario. To do this, set OC-bailout to ON. The Planner will then calculate decompres-
sion stops and the gas usage for the scenario where the ascent is made in bailout mode after
the planned Dive time. During the calculated ascent in bailout mode, the enabled bailout gases
will be used according to their MOD. Don´t forget to add 50% conservatism to the calculated
gas volumes in case of any mishaps during bailout.
For more comprehensive dive planning we recommend you to use the Reef app. The Reef app
is also a dive logging app for all your dives. Here you can analyze your dives and add pictures
and text from the dive sites.
WARNING:
The Planner does not warn for high or low ppO2, excessive
oxygen exposure (OTU above limit), narcotic effect of breathing
gases, breathing gas density, isobaric counter diffusion nor
gas consumption beyond the available gas supply volume in
planned dives.