: Demarks the boundary between "safe water" and "shallow water" with a bold isoline. It is the primary parameter for anti-grounding alarms. Safety Depth
: Used by the ECDIS to highlight soundings. Depths equal to or less than this value appear in black, while deeper soundings appear in gray. Display Modes : The system offers ecdis transas 4000 answers
: Always cross-check manually entered tidal values before passing a waypoint, as these affect depth calculations. Cross Track Distance (XTD) : Demarks the boundary between "safe water" and