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To set Keel Offset:
1. Press MENU|MENU|↓ to SET KEEL OFFSET|ENT.
2. The Keel Offset dialog box appears. Press ↓ to so that the displayed
number shows a minus (–) sign instead of the plus (+) sign.
3. Press ↓ until the number shows – 3.5, then press
EXIT. The depth
indicators now accurately show the depth of water beneath the keel.
Waterline Offset
You can get a more precise measure of water depth by using waterline
offset, which takes into account the distance from the transducer to the
waterline when calculating depth.
Before setting waterline offset, you must measure the distance from the
transducer to the waterline on your boat. If, for example, the transducer
is 1.5 feet below the waterline, it will be input as +1.5 feet.
To set Waterline Offset:
1. Press MENU|MENU|↓ to SET KEEL OFFSET|ENT.
2. The Keel Offset dialog box appears with a plus (+) sign at the front of
the box.
3. Press ↑ until the displayed number is + 1.5 and press
EXIT. The
depth indicators now accurately show the water depth from surface to
bottom.
Sonar Color Mode
The default color scheme for the sonar chart is grayscale, but we offer
other variations to suit your viewing preferences. You have the chart
displayed in reverse grayscale, bottom black or FishReveal mode.
To change the chart mode color scheme:
1. From the Sonar Page, press MENU|↓ to SONAR FEATURES|ENT.
2. Press ↓ to
SONAR CHART MODE|ENT.
3. Press ↓ or ↑ to Mode Name|
ENT.
4. Press
EXIT|EXIT to return to the Sonar Page.
Sonar Chart Display Options
The M52 Pro offers five Sonar chart display options. To choose among
them, press
EXIT to clear any menus, then press PAGES and use the ar-
row keys to select the desired mode.
Full Sonar Chart
This is the default mode used when the Sonar is turned on for the first
time or when it's reset to the factory defaults. The bottom signal scrolls
across the screen from right to left. Depth scales on the right side of the