17-9 Setup > Alarms
Press 
twice, then select Alarms:
All alarms except Loss of GPS fix can be turned on (enabled) or off (disabled).
For all alarms select 
to turn the alarm on or select 
to turn the alarm off.
For most alarms there is a trigger value. The alarm will sound each time the alarm value equals the trigger value. For example, the Danger alarm will sound if the boat comes closer to a danger waypoint than the trigger value and the Anchor alarm will sound if the boat moves by more than the trigger value.
Icons for alarms that are on can be displayed in the data header (see section
Symbol Alarm
Arrival radius
Anchor alarm
XTE
Danger
Loss of DGPS fix
Loss of GPS fix
Loss of
AIS receiver communication
Alarm sounds when it is on and the:
Boat is closer to the destination or to a waypoint than the alarm trigger value
Boat moves by more than the alarm trigger value
Boat moves off course by more than the CDI scale (see section
Boat comes closer to a danger waypoint than the alarm trigger value
657 can not receive the DGPS signal (beacon, WAAS or EGNOS)
657 can not receive the GPS signal (this alarm is always on
657 is no longer receiving communication from the AIS receiver (Alarm is on when AIS is enabled)
Fish | Echo matches the profile of a fish |
Too shallow | Depth is less than the alarm trigger value |
Too deep | Depth is greater than the alarm trigger value |
Temperature | Temperature equals the alarm trigger value |
Temperature rate | Rate of change of temperature equals the alarm trigger value |
Low battery | Battery voltage is less than the alarm trigger value |
Low fuel | Fuel remaining equals the alarm trigger value |
70 | Northstar Explorer 657 Installation and Operation Manual |
