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15. With the transducer lowered (mid or fully lowered), confirm that the transducer is
raised when the
3.9
How to Adjust the Heading
Heading correction at the hull unit
When the BOW mark on the flange of the hull unit cannot be directed toward ship's
bow, adjust the heading so an echo which is dead ahead appears dead ahead on the
display.
1. Enable transmission as shown in section 3.8.
2. Find a target in the bow direction (buoy, for example) and display it on a near
range perfectly. If the target appears at 12 o'clock the heading alignment is cor-
rect. If it does not, measure the error and go to next step.
Buoy
3. If the heading is skewed, measure the skew angle.
4. Access the System menu, referring to section 3.1.
5. Select [Others] from the System menu items, then left-click.
6. Select [Heading Adjust 1] then left-click.
7. Rotate the scrollwheel to enter the angle measured at step 3. The setting range is
-180° to 179°, in one-degree increments.
8. Select [Quit] then left-click.
9. Select [Heading Adjust 2] then left-click.
10. Rotate the scrollwheel to enter the angle measured at step 3. The setting range is
-180° to 179°, in one-degree increments.
11. Select [Quit] then left-click.
12. Select Quit on the topmost menu then left-click.
switch or the OFF switch is pressed.
3. ADJUSTMENTS AND CHECKS
If target's on-screen
position is right of ship's
bow, for example, heading
is skewed left.
3-9
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