AIS/ARPA Alarms

CPA/TCPA Alarm – Alarm that is triggered when the closest point of approach to the boat and any other AIS/ARPA target is less than the specified distance, or the time to the CPA (TCPA) is less than the specified time.

Speed Alarm

Enable Speed Limit – enables/disables speed alarms. A speed alarm is raised if the vessel speed exceeds the speed given on the current leg of the active route, by at least the threshold limit.

Speed Limit Threshold - amount by which speed must exceed the leg speed before the alarm is raised.

Speed Alarm Interval - amount of time that will elapse between speed alarms if the vessel speed does not come back down below the speed limit.

General Alarms

Enable Marker Alarms – enables/disables alarms for arrival/departure from markers.

Enable XTE Alarms – enables/disables alarms when the XTE (Crosstrack) exceeds XTE (Crosstrack) Alarm Distance. This is a warning that the boat is too far off course.

Enable Waypoint Alarms – enables/disables alarms for arrival/departure from waypoints.

Enable Zone Alarms – enables/disables alarms for entry/exit alarms for zones.

Enable Device Timeout Alarms - determines if an alarm is raised when a device (AIS/GPS) stops receiving data.

Waypoint Alarm Trigger – determines which alarms are triggered for waypoint.

XTE Alarm Distance – distance that controls when the XTE alarm is displayed.

Ranges

Show AIS Filter Range – turns on/off drawing of the AIS Filter Range Circle around the boat.

Show Proximity Range – turns on/off drawing of the Proximity Range Circle around the boat.

Show Marker Arrival Range – turns on/off display of arrival range circles around markers.

Show Waypoint Arrival Range – turns on/off display of arrival range circles around waypoints (works only if route is activated).

Default Marker Arrival Range – the value that will be set for the arrival range of new markers

Default Waypoint Arrival Range – the value that will be set for the arrival range of new waypoints

Proximity Range – determines when to draw distance bearing tags to objects and when objects should be drawn in the highway view.

AIS Filter Range – AIS targets outside the AIS filter range are shown as dots on the screen to reduce clutter. AIS targets outside the AIS filter range are also controller by the filter options in the AIS/ARPA tab.