Via <setdcallgasdefinitions/> all breathing gas definitions (see <gasdefinitions>) are transferred to the dive computer.
(see also <setdcdata>)
<divecomputercontrol>
<setdcdata>
<setdcgasdefinitionsdata>
<!-- send all defined breathing gases to the dive computer -->
<setdcallgasdefinitions/>
</setdcgasdefinitionsdata>
</setdcdata>
</divecomputercontrol>