3. POST INSTALLATION SETTINGS
3-9
3.5 How to Adjust the Heading
Heading correction at the hull unit
When the BOW mark on the flange of the hull unit can not be directed toward ship’s
bow perfectly, adjust the heading so an echo which is dead ahead appears dead
ahead on the display.
1. Enable transmission as shown in "How to check transmit status" on page 3-4.
2. Find a target in the bow direction (buoy, for example) and display it on a near
range. If the target appears at 12 o’clock, the heading alignment is correct. If it
does not, measure the error and go to next step.
3. If the heading is skewed, measure the skew angle.
4. Access the system menu (See paragraph 3.4.1).
5. Select [Heading Adjust 1] then left click.
6. Rotate the scrollwheel to enter the angle measured at step 3. The setting range is
-180°to 179°, in one-degree increments.
7. Select [Quit] then left click.
8. Long-press the MENU/ESC key to close all menus.
Heading correction at the motion sensor
Heading correction at the motion sensor is done with [Heading Adjust 2] on the
[Others] menu.
• If the control box is mounted on the hull unit, set the same heading correction as
entered for [Heading Adjust 1] (in [Others] menu).
• If the control box is mounted independent of the hull unit, set the angle measured
from the bow in the clockwise direction. The angle is 0° if the lid of the control box
is directed toward ship’s stern precisely.
• If the motion sensor is a GPS gyro, set the angle to 0°.
If target's on-screen
position is right of ship's
bow, for example, heading
is skewed left.
Buoy
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