With <setdcaltitude> the altitude in metres above sea level (given as a real number) can be set in the dive computer for the next dive. This element serves for an easy way to set the altitude for a dive spot in the dive computer without cross-referencing to a previous made data base for this lake, or river.
(see also <setdcdata>)
<!-- altitude above sea level 450.0 m of dive spot -->
<setdcaltitude>450.0 </setdcaltitude>