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Chapter 4: Using the Chart 85
Setting the motion mode
The motion mode controls the relationship between the chart and your boat. Whilst
motion mode is active, as your boat moves, the chart is redrawn to keep the boat on-
screen. The three motion modes are:
•Relative motion.
• True motion.
•Autorange.
When you pan the chart or toggle FIND SHIP/CURSOR to CURSOR, the motion mode is
suspended. This is indicated in the status bar by ‘( )’ around the motion mode and
enables you to view another area of the chart whilst navigating. To reset the motion
mode and return your boat to the screen, press FIND SHIP. Manually changing the
range in autorange also suspends motion mode.
The default setting is relative motion with zero offset. The mode that you select is
restored at power up. When a chart window is set to SYSTEM view the motion mode
will be set but not synchronized across other system view windows.
Relative motion (RM) with optional vessel offset
When the motion mode is set to Relative, the position of your boat is fixed on the
screen and the chart picture moves relative to your boat.
You can specify using the VESSEL OFFSET soft key, whether the boat is fixed in the
centre of the window (0 offset) or offset by 1/3 or 2/3. If you change the offset to 1/3 or
2/3, the view ahead of your boat will be increased.
D6512-2
CHART MODE AND
ORIENTATION…
PRESENTATION…
MOTION MODE
TM RM AR
D6839_3
0 Vessel offset
1/3 Vessel offset
0 Vessel offset
81221_4.book Page 85 Tuesday, February 28, 2006 5:24 PM