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To adjust sensitivity in auto mode:
1. From the Sonar Page, press MENU|↓ to AUTO SENSITIVITY|ENT.
2. Highlight
SENSITIVITY and press ENT.
2. The Sensitivity Control Bar appears. Press ↓ to decrease sensitivity;
press ↑ to increase sensitivity. When it's set at the desired level, press
EXIT.
At left, Sonar Menu with Sensitivity command selected. At right, the
Sensitivity Control Bar.
To adjust sensitivity in manual mode:
1. First, turn off Auto Sensitivity: from the Sonar Page, press MENU|↓
to
AUTO SENSITIVITY|ENT.
2. Press ↑ to
SENSITIVITY|ENT and the Sensitivity Control Bar appears.
Press ↓ or ↑ to pick a different sensitivity setting. When it's set at the
desired level, press
EXIT.
Keel and Waterline Offset
Water depth is measured from the transducer to the bottom, which not
only diminishes the accuracy of depth readings, but also could present
a problem for vessels with a large keel. The Offset feature can correct
both issues via Keel Offset and Waterline Offset.
Keel Offset
You can protect your boat’s keel from obstructions by changing unit
settings to display water depth from the keel to the bottom instead of
from the transducer to the bottom. Before setting keel offset, measure
the distance from the transducer to the lowest part of the keel. If, for
example, the keel is 3.5 feet below the transducer, it will be input as –3.5
feet.