Simrad Maris ECDIS900 Operator's Manual page 178

User defined alarm
The object outline changes to red to underline that it has become an alarm object. (One pixel
wide and no filling for area).
Where the alarmed object is a point, this is surrounded by a red rectangle
When the object triggers an alarm the display changes, the lines are drawn in red, 2 pixels
wide.
M
ONITORING USER ALARM
When the ship's guard zone intercepts an alarmed object an alarm is triggered. The alarm is
displayed as long as the alarmed object remains inside the ships guard zone.
REMARK
178