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S57 SENC Conversion details
S57 charts from Hydrographic offices are called ENCs. An ENC has to be converted into SENC format before it can
be used in the ECDIS. The ECDIS can convert ENC into SENC format automatically. If the conversion is
successful, the Failed SENC conversion window does not appear.
If the system fails to convert ENC into SENC or if the system detects an coding error in an ENC, a Failed SENC
conversion window appears with a list of failed ENCs. In this window you can select any of the charts to see reason
for failure in conversion.
Normally the conversion is initiated automatically from loading of the charts. Chapter "How to load S57 charts" on
page 54 describes the loading process. Chapter "How to select automatic SENC conversion and Display Until date"
on page 63 describes how you can select automatic conversion. You can also initiate conversion from a SENC
convert window or from a Cell Status window.
How to make SENC conversion faster
The SENC conversion speed depends about how many other tasks the system has. The system can do SENC
conversion as background process during any other possible operational use of the system, but you can greatly
improve the speed of the SENC conversion, if you do following things:
1. Disable Radar echo overlay. Select Radar overlay mode as ECDIS ONLY. Select control of visible navigation
features as OFF for Radaroverlay (the Radaroverlay visibility control is located in "Tracking" sheet of "Chart
details").
2. Select Display Mode as TRUE MOTION
3. Press Set Chart Center push button and allow the system to operate either in TM RESET OFF or SHIP OFF
SCREEN state
4. Press Zoom In until you reach scale of 1:1 000
How to select automatic SENC conversion and Display Until date
When you are loading new S57 charts base cells and/or their updates into hard disk, it is possible make automatic
conversion to SENC format. It is also possible to set display dates as issue dates automatically. Proceed as follows
to set these options:
1. Press CHART PLAN button, select SENC Convert Settings from the menu.
2. A S57 Settings dialog box appears:
Select Automatic SENC Conversion and Automatic Display Until options.
Vector Chart material • • • • 63
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