When in Multiple Echo mode and a Multiple
Echo verification has been found the three
echo points are marked by three square
boxes.
A-Scan Display in Single Echo Mode
In Single Echo mode the A-Scan display will always be displayed
and cannot be turned off.
Surface Preparation
The DIVE gauge will not measure through barnacles or similar
hard encrusters. You must therefore remove any hard marine
growth before attempting a thickness measurement, typically
divers use a scraper to do this.