Inside <maximumdepth> the maximum depth in metres of the dive spot is put into brackets (not the greatest depth reached during a specific dive — see <greatestdepth>!).
<sitedata>
<arealength>, <areawidth>, <greatestdepth>, <minimumdepth>, <sitedata>
(see also <sitedata>)
<!-- maximum depth (ground) at dive spot 42 m -->
<maximumdepth>42.0<maximumdepth>