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Conguring the Chartplotter
52 GPSMAP 400/500 Series Owner’s Manual

1. 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.
2. From the Home screen, select  >  > .
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  to accept the number.
—set the temperature offset for the temperature sensor of your
transducer.

You must have a NMEA 0183 water-temperature sensor, a Garmin Intelliducer,
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  >  > .
5. Enter the temperature offset calculated in step 3.
6. Select .
—use this menu to calibrate a speed-sensing device.
Follow the on-screen directions for calibration. If you do not have a speed-
sensing device, this menu does not appear.
 If the boat is not moving fast enough or the speed sensor is not
registering a speed, a “Speed Too Low”message appears. Select , and
safely increase the speed of the boat. If you get the message again, stop the
boat and make sure the speed-sensor wheel is not stuck. If the wheel turns
freely, check the cable connections. If you continue to get the message, contact
Garmin Product Support.
—enter the combined fuel capacity of all the engines on your
boat.
58


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