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Display mode and Orientation of Chart
DISPLAY MODE push button is used to select between true motion and relative motion display modes. In true
motion mode ECDIS shows own ship's position, and other movable data such as radar targets, moving on the earth-
fixed chart background. In relative motion mode ECDIS shows the chart information, and radar targets, moving
relative to own ship position fixed on the screen.
Indication of Display mode is shown on Upper Status bar of ECDIS.
An example where True Motion with North Up orientation is selected.
See list below which orientations of chart can be used with True Motion and with Relative Motion.
True Motion:
· True Motion North Up
· True Motion Course Up
In True Motion display mode, the orientation of chart is set again when automatic TM RESET happens, when you
press TM/CU RESET button or when you press SHIP OFF CENTER button.
Relative Motion:
· Relative Motion North Up
· Relative Motion Course Up
· Relative Motion Head Up
· Relative Motion Route Up
In Relative Motion display mode, the orientation of chart is set again when you press TM/CU RESET button or
when you press SHIP OFF CENTER button.
Notes:
· If you use Head Up or Route Up together with Relative motion, then the orientation is set again whenever the
source of it has been changed.
· Route Up orientation of chart will be redrawn when new To WP is set.