66
Setup Instructions
shown using a more solid area of black or gray. This
feature helps to show the difference between the strong
echo from the bottom and the weaker echoes from fish or
weeds near the bottom. The image shown in Fig. 3-4 is
presented with the White Line feature turned on.
VRM
“VRM” means “Variable Range Marker.” On this unit, the
VRM feature offers a way of finding the depth of an object
on the display. When used with the FishFinder Page, the
VRM feature creates a horizontal line across the display.
Using the
<
and
V
arrows on the Page Control Pad, you
can move this line up or down on the display. As the line
moves, a number shows the depth indicated by the line. By
moving the line so that it covers a particular target on the
display, you can find the depth of that target. When the
Bottom Lock Mode is turned on, the VRM line measures a
distance
up from the bottom. When the optional Sidelooker
Mode is in use, there may be two vertical VRM lines - one
to either side of the centerline. You can move these lines
toward or away from the centerline using the
<
and
V
controls on the Page Control Pad. Keep in mind that if
Zoom is set to Manual, the VRM on the FishFinder Page is
linked to the Zoom adjustment. That is, they are adjusted
together using the
<
and
V
controls.
Sidelooker
This item is used with the optional “Sidelooker” transducer.
This type of transducer sends sound waves out to the sides
of the boat. See Fig. 3-9. If you have installed this
transducer, use this entry in the System Setup Menu to turn
on the Sidelooker feature.
Speed Cal
This unit can detect and display the speed of the boat
through the water. It also uses the speed information to
calculate the distance traveled (the “log”). The item for
Speed Cal allows you to adjust the speed reading to make
it match your actual speed through the water. It presents a
reading in percentage points. A reading of 100% means
the speed readings from the factory default calibration are
accurate, and the unit does not need any correction. If the
