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GPSMAP 700 Series Owner’s Manual 77
Sonar
Adjusting the Range of the Depth Scale
You can adjust the range of the depth scale that appears on the right side of the screen.
1. From the Home screen, select .
2. Select a sonar view.
3. Select  > .
4. Complete an action:
Select  to allow the chartplotter to adjust the depth scale automatically.
Select  or  to increase or decrease the range of the depth scale manually.
5. Select .
 From the sonar screen, you can press or to manually adjust the range of the depth
scale.
Sonar Alarms
Setting the Shallow Water and Deep Water Alarms
1. From the Home screen, select  >  > .
2. Select  >  to set an alarm to sound when the depth is less than the specied value.
3. Enter the depth that triggers the shallow water alarm.
4. Select .
5. Select  >  to set an alarm to sound when the depth is greater than the specied value.
6. Enter the depth that triggers the deep water alarm.
7. Select .
Setting the Water Temperature Alarm
You can set an alarm to sound when the transducer reports a temperature that is 2°F (1.1°C) above or below
the specied temperature.
1. From the Home screen, select  >  >  >  > .
2. Enter a water temperature.
3. Select .
Setting the Fish Alarm
You can set an alarm to sound when the chartplotter detects a suspended target of the specied symbols.
1. From the Home screen, select  >  >  > .
2. Complete an action:
Select to sound an alarm for all sh sizes.
Select to sound an alarm for medium and large sh only.
Select to sound an alarm for large sh only.