Raymarine C140w, C90w manual Chart orientation, Selecting local or system chart view, North Up N-up

SYSTEM	When a chart application is started, it defaults to SYSTEM
chart view	view. Any windows set to SYSTEM view will have the same
	presentation as other system windows for:
	• Chart mode and orientation.
	• Chart layers — radar and AIS.
	•	Radar/chart synchronization.
	• Show/hide waypoints, routes and tracks.
	•	Declutter.
	•	Vectors.
	If you change any of these options in one window, all system
	windows will be updated.
LOCAL	When LOCAL chart view is selected, the presentation for each
chart view	window is set independently.

Selecting local or system chart view

In the chart application:

1.Press the PRESENTATION softkey.

2.Press the CHART VIEW softkey to toggle between LOCAL and SYSTEM chart views.

Note: The motion mode will be set but not synchronized across windows when the chart view is set to SYSTEM.

Chart orientation

The orientation of a chart refers to the relationship between the chart and the direction that you are travelling in.

It is used in conjunction with motion mode to control how your boat and chart relate to one another and how they are displayed on screen. The mode that you choose is restored at power up. Any changes that you make to a chart window that is set to system view will be reflected in all other system view chart windows. The following options are available:

North Up (N-up)

In North Up mode, the chart orientation is fixed with true north upwards. As your heading changes the boat symbol moves accordingly. This is the default mode for the chart application.

Head Up (H-up)

Head Up mode displays the chart with your boat’s current heading upwards. As the heading changes the boat symbol remains fixed and the chart picture rotates accordingly.

Note: To prevent continuous backwards and forwards rotations as the boat yaws from side-to-side, the chart will not update unless the heading changes by at least 10 degrees from the last displayed orientation.

Note: It is not possible to select Head Up when the motion mode is set to True.

Course Up (C-up)

In Course Up mode, the chart picture is stabilized and shown with your current course upwards. As your boat’s heading changes, the ship symbol moves accordingly. If you select a new course, the picture will reset to display the new course upwards. The reference used for Course-Up depends upon the information available at a given time. The system always prioritizes this information in the following order:

1. Bearing from origin to destination, i.e. intended course.

Using the chart 61