Configuring the Chartplotter

2.Use the Rocker to enter the measured distance from the transducer location to the water line or to the keel of the boat.

•If you are measuring down to the keel (transducer installed at the water line), enter a (+) positive number. This shows the depth at the bottom of the keel.

•If you are measuring up to the water line (transducer installed on the bottom of the keel), enter a (-) negative number. This shows the depth at the surface.

3.Select Done to accept the number.

Transducer at Surface

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.

Temp Offset—set the temperature offset for the temperature sensor of your transducer.

Calibrate Water Speed—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.

Note: If the boat is not moving fast enough or the speed sensor is not registering a speed, a “Speed Too Low” message appears. Select OK, 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.

Fuel Capacity—enter the total fuel capacity of your boat.

Configuring Other Vessels

To configure settings for boats other than your own, from the Home screen, select Configure > Other Vessels.

NOTE: To configure AIS or DSC information for other boats, your unit must be connected to an external AIS or DSC device.

AIS—turn AIS (Automatic Identification System) on or off. AIS alerts you to area traffic by providing boat IDs, position, course, and speed for boats that are within range and equipped with a transponder.

DSC—turn DSC (Digital Selective Calling) on or off.

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GPSMAP 400/500 Series Owner’s Manual