Appendix 4: C-MAP CM-93/3 Charts
AP-41
5. The chart limit boxes are color-coded as follows:
Green
The chart is available for use in SENC format. If the source of the chart is an RENC then the chart is
also up-to-date. If the source of the chart is something other than an RENC, then all loaded updates are
included into the SENC.
Orange
The chart is available for use in SENC format but the chart is either not
up-to-date or has been
cancelled. Either the SENC is from a former edition, the SENC is missing the latest updates or the
chart has been cancelled.
Red
If the chart is permit free, you do not have it available for use in SENC format and thus you cannot use
the chart currently.
The chart requires a permit but you do not have the permit for the chart therefore you cannot use the
chart currently.
Blue
The chart is available either in ENC format, in SENC format for another software version or in SENC
format for another ECDIS. For example, the chart is blue during SENC conversion and when you
loaded a chart into the ECDIS and the system could not convert the chart into SENC format.
Magenta
You have a permit to use the chart, but the chart is not available in SENC format and thus you cannot
use the chart currently.
How to browse your charts
You may view CM-93/3 charts using different positions and different scales. The basic tools for browsing charts are
Range-, Range+, Active scroll, Set Chart Center, Ship Center(Ship Offcenter) and TM/CU Reset.
Activate Scroll allows you to look ahead from a place other than own ship’s current position. Spin the scrollwheel
to display Set Chart Center/Info/Activate Scroll in the mouse functions area. Move cursor to desired place on chart
then push the right mouse button. Keep button pressed down while moving cursor over desired place. Release right
button to get chart redrawn. You can repeat this until you have desired area on screen. When true motion reset is
off, the indication "TM/CU Reset off" or "Ship out of dsp" appears in the information area.
Set Chart Center allows you to look ahead from a place other than own ship's
current position. Select Set Chart Center from the Main menu to display the dialog
box shown right. Use the scrollwheel to set the latitude and longitude position for
chart center then click the Set Center button.
Note: The chart can also be centered (with less precise positioning) by placing the
cursor at desired location, displaying Set Chart Center/Info/Activate Scroll in the
dialog box and pushing the left mouse button.)
To restore own ship’s position to the screen center, display TM/CU Reset/Info/ShipOffcenter in the mouse functions
area then push the left mouse button.
Range - and Range+ change the chart scale. If true motion reset is active, ZOOM IN and ZOOM OUT keep the
relative position of your ship with respect to the display. If true motion reset is on, ZOOM IN and ZOOM OUT keep
the relative position pointed by the cursor with respect to the display.
The system automatically selects next larger or smaller scale. If a chart with larger compilation scale is available at
your current viewing position, the message "Larger Scale Data Exists" appears.
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