Keel Offset; Transducer Setting; Speed Calibration; Calibrate Temperature Display - Standard Horizon MD150 Owner's Manual

5.13.1 Keel Offset

The MD150 will normally display the depth of water
below the face of the transducer. You may introduce
a keel offset to display the depth of water below the
keel. A positive value may be entered to display
the depth of water from the water surface to the
bottom. This is often called waterline offset.
Follow the Secondary Functions chart to reach Keel
Offset mode.
Use the or
When required value is displayed press the
key. The value will be stored in memory.
Note: When the depth units are changed the
keel offset value will automatically
be recalculated and displayed in the new units.

5.13.2 Transducer Setting

Three values of transducer setting can be selected
(1 to 3). The lower numbers improve the shallow
water performance and may produce reliable readings
to below 3 feet. It is recommended to use the lowest
number possible if shallow water performance is
important. It must also be noted that in situations
where the MD150 is tracking the bottom and
displaying a constant depth but occasionally
displaying "--" or erroneous depths of 3 to 4 feet,
that this generally indicates the transducer setting
is too low and should be increased.
Follow the Secondary Functions chart to reach
Transducer Setting mode.
Use the or
To enter the transducer setting into memory and
exit press the key.
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key to set the required value.
keys to set the required value.

5.13.3 Speed Calibration

Use the following sequence to adjust the speed
displayed to match that of another craft or the
speed displayed on a GPS receiver.
Follow the Secondary Functions chart to reach Speed
Calibration mode.
To increase reading press the
To decrease reading press the
To enter the calibration setting into memory and exit
press the
Note: When the speed calibration is
adjusted, the trip log and the average speed
will be reset.

5.13.4 Calibrate Temperature Display

To adjust the temperature displayed.
Follow the Secondary Functions chart to reach
Temperature Calibration mode.
To increase reading press the
To decrease reading press the
To enter the calibration setting into memory and exit
press the

5.14 Simulation Mode

The MD150 has a simulation mode.
To enter this mode, hold down the
switch on the power. The instrument will remain in
this mode even when power is switched off.
Repeat this procedure to exit simulation mode.
Note: Settings that are made while in
simulation mode will remain in effect
after returning to normal mode.
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