Reset Water Distance; Set Keel Offset - Lowrance LCX-112C Operation Instructions Manual

System Setup menu with Reset Options command selected (left). The
NOTE:
Reset Options does not erase any waypoints, routes, plot trails, or sonar
logs.

Reset Water Distance

The sonar chart's Digital Data display option includes a window that shows
distance traveled, called Water Distance ("W Distance"). This information is
calculated from an optional water speed sensor, not the GPS. The Water
Distance window can be reset to zero using the Reset Water Distance
command.
Press |
MENU MENU
The menus are cleared and water distance is reset to 0.00.

Set Keel Offset

This unit measures water depth from the face of the transducer. Since the
transducer is installed below the water surface, the depth displayed by the
digital depth, chart depth scale, chart cursor or fish symbols is not exact. If
the transducer is 1 foot below the surface, and the screen shows the water
depth as 30 feet, then the actual depth is 31 feet.
On sailboats or other large vessels with deep drafts, the distance between
the transducer installation and the keel or lower engine unit can be several
feet. In those cases, an inexact depth reading could result in grounding or
striking underwater structure. The Keel Offset feature eliminates the need
for the navigator to mentally calculate how much water is under his keel.
Keel Offset lets you calibrate the digital depth: chart depth scale, chart
cursor depth and fish symbol depth displayed on the screen. To calibrate the
depth indicators, first measure the distance from the face of the transducer
to the lowest part of the boat. In this example, we will use 3.5 feet. This will
enter as a negative 3.5 feet, which makes the depth indicators perform as if
the transducer's lower in the water than it really is.
Reset Options dialog box (right).
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ONAR ETUP
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ESET
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W D
ATER ISTANCE
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