3 Basic Operation of ECDIS 3-66
3.7 Selecting Motion/Azimuth Mode
You can select the motion of your ship on the chart and the azimuth of your ship relative to the chart
using the display panel buttons or the menu. Note that the selectable mode differs depending on the
chart type, either S-57/C-MAP Ed.2/C-MAP Ed.3/ARCS.
S-57/C-MAP Ed.2/C-MAP Ed.3 Chart:
[Possible combination between Motion and Azimuth modes]
Azimuth
Motion
North Up Course Up WPT Up Rotation
True Yes No No Yes
Relative Yes Yes Yes Yes
Free Yes No No Yes
ARCS Chart:
(1) Explanation of each mode:
For selectable modes, see the above explanation. For example, on the S-57/C-MAP chart, you cannot
use the combination of [True] or [Free] mode and [Course Up] and [WPT Up] mode. Also, on the ARCS
chart, you cannot select Azimuth mode.
1) Motion mode (True/Relative/Free):
True： Land and other fixed objects are fixed on the display and only own ship moves on the display.
When own ship reaches the predetermined limit, the chart is automatically shifted so that
own ship always remains on the screen.
Relative： Own ship is fixed at the center of the screen and the fixed objects such as land move
relatively.
Free： You can freely rotate the chart on the display regardless of the own ship’s direction of travel.
Also, as the ship goes, it move and will disappear from the screen.
Motion drop-down
list button
Azimuth drop-down
list button
Motion drop-down
list button
For [Rotation] mode
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