Step 5: Test The Installation - Garmin GPSMAP 420 Owner's Manual

Step 5: Test the Installation

To turn on your unit for the first time, press and hold the
POWER key until the unit beeps and turns on. Use the
and the SELECT keys and follow the screens to configure your unit.
NOTE: Although you can perform some checks with the boat
trailered, the boat should be in the water to properly test the
installation.
To configure your unit �or the first time� configure your unit �or the first time�
1. Select the Language.
2. Select attached NMEA
3. Select the Transducer type (if applicable).
4. Select the Position Format
5. Select the Time Format (the default is 12 Hour).
6. Select your Time Zone.
7. Select your preferred Units of measure.
8. Select Minimum Depth.
9. Select the Overhead Clearance of your boat.
GPSMAP 400 Series Owner's Manual
®
ROCKER
Devices.
(the default is hddd°mm.mmm').
The Home screen appears (see
configuration options.
NOTE: You can adjust these options in the future from the
Configure screen.
Because water is necessary to carry the sounder's sonar signal, the
transducer must be in the water to work properly. You cannot get a
depth or distance reading when out of the water.
When you place your boat in the water, check for leaks around
any screw holes that were added below the water line. DO NOT
leave your boat in the water for an extended period of time without
checking for leaks.
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page 6) after you select your
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