Setting The Water Temperature Offset - Garmin GPSMAP 6008 Owner's Manual

Sonar
1. Measure the keel offset, 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.
2. From the Home screen, select
Boat Keel offset.
>
3. Enter the keel offset measured in step 1:
• For the GPSMAP 6000 series, use the Rocker or the Numeric Keypad to enter the distance measured
in step 1. Ensure that you enter a positive or a negative number based on the location of the transducer.
• For the GPSMAP 7000 series, use the on-screen keyboard to 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 water-temperature sensor or a temperature-capable transducer.
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 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:
• For the GPSMAP 6000 series, use the Rocker or the Numeric Keypad to enter the temperature offset.
• For the GPSMAP 7000 series, use the on-screen keyboard to enter the temperature offset.
6. Select Done.
Adjusting the Transducer Settings
Note: These features are available only on the GSD 24 and GSD 26.
1. From the Home screen, select Sonar.
2. Select a sonar view.
3. Select Menu > More
4. Select one or more options:
• Select transmit Rate
the scroll speed, but this might also create self-interference.
• Select transmit Power
reduce the ringing.
• Select Filter Width
Longer filters will create softer target edges, but may reduce noise.
transducer Diagnostics
• Select
108
Configure My
>
Configure My Boat
>
> Installation.
to help reduce self-interference. You can increase the transmit rate to speed up
to reduce transducer ringing near the surface. Lower the Transmit Power to
to define the edges of the target. A shorter filter will define the edges of the targets.
to view details of the transducer.
Keel Offset
temp offset.
>
GPSMAP 6000/7000 Series Owner's Manual
®
Transducer at the water
line
A (+) positive number
shows depth at the bottom
of the keel.
Transducer at the bottom
of the keel
A (-) negative number
shows depth at the surface.