Garmin GPSMAP 700 - Transducer Configuration

GPSMAP
®
700 Series Owner’s Manual 83
Sonar
Transducer Conguration
Setting the Keel Offset
The keel offset compensates for the surface reading for the depth of a keel, making it possible to
measure depth from the bottom of the keel instead of from the transducer location. Enter a positive
number to offset for a keel. You can enter a negative number to compensate for a large vessel that
may draw several feet of water.
1. Complete an action, based on the location of the transducer:
If the transducer is installed at the water line, measure the distance from the transducer
location to the keel of the boat. Enter this value in step 3 as a positive number.
If the transducer is installed at the bottom of the keel, measure the distance from the
transducer to the water line. Enter this value in step 3 as a negative number.
Transducer at the water line
Transducer at the bottom of
the keel
Keel Offset
A (+) positive number
shows depth at the bottom
of the keel.
A (-) negative number
shows depth at the surface.
2. From the Home screen, select Congure > My Boat > Keel Offset.
3. Enter the distance measured in step 1. Ensure that you enter a positive or a negative number
based on the location of the transducer.
4. Select
Done.
Setting the Water Temperature Offset
You must have a NMEA 0183 water-temperature sensor or a temperature-capable transducer to
measure water temperature.
The temperature offset compensates for the temperature reading from a temperature sensor.
1. Measure the water temperature using the temperature sensor or temperature-capable transducer
that is connected to the chartplotter.
2. Measure the water temperature using a different temperature sensor or a thermometer that is
known to be accurate.
3. Subtract the water temperature measured in step 1 from the water temperature measured in
step 2.
This is the temperature offset. Enter this value in step 5 as a positive number if the sensor
connected to the chartplotter measures the water temperature as being colder than it actually
is. Enter this value in step 5 as a negative number if the sensor connected to the chartplotter
measures the water temperature as being warmer than it actually is.
4. From the Home screen, select
Congure > My Boat > Temp Offset.
5. Enter the temperature offset calculated in step 3.
6. Select
Done.
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