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GPSMAP 400/500 Series Owner’s Manual 55
Conguring the Chartplotter
Conguring My Boat
To congure settings for your boat, from the Home screen, select
Congure > My Boat�
—offset 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. Enter a negative number to compensate for a large
vessel that may draw several feet of water.
To adjust the Keel Offset:
1� From the Home screen, select Congure > My Boat > Keel
Offset�
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�
A (+) positive number
shows depth at the bottom
of the keel.
Transducer at Surface
A (-) negative number
shows depth at the
surface.
Transducer at the
Bottom of the Keel
—set the temperature offset for the temperature sensor
of your transducer.
—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.