<divedepthstep> sets the increment for the dive depth in metre (as a real number) for table output.
If <divedepthstep> is "forgotten", it is up to the executing software to set a "reasonable" increment for table output.
<divedepthbegin>, <divedepthend>, <tablescope>
(see also <tablescope>)
<!-- increment 5 m for table output --> <divedepthstep>5.0</divedepthstep>