Chart Legend Of S57 Chart - Furuno FEA-2107 Operator's Manual

8. Vector Chart Material
Each S57 chart may contain additional links to textual descriptions or pictures, besides the chart itself. Typically
additional textual descriptions and pictures contain important sailing directions, tidal tables and other traditional
paper chart features that do not have any other method to be included into the S57 chart. This ECDIS copies these
textual descriptions and pictures into its hard disk so the user may cursor-pick them for viewing purposes.
For how to interpret the S57 ENC chart display, see Appendix 2.
Definitions of terms
A cell is a geographical area containing ENC data. Each cell has a separate unique name.
Cell
Hydrographic Offices divide their responsibility area by the cells that they publish.
A database, standardized as to content, structure and format, is issued for use with ECDIS
S57 chart
without any authority of government-authorized Hydrographic Office. The difference of S57
chart and ENC is that non-ENC charts require complete up-to-date paper charts to be used as
the primary aid to navigation.
A database, standardized as to content, structure and format, is issued for use with ECDIS on
ENC
the authority of government-authorized Hydrographic Offices. The ENC contains all the chart
information necessary for safe navigation and may contain supplementary information in
addition to that contained in the paper chart (e.g., sailing directions) that may be considered
necessary for safe navigation. The name of the coding standard for ENC is S57ed3.
A database resulting from the transformation of the ENC by ECDIS for appropriate use,
SENC
updates to the ENC by appropriate means, and other data added by the mariner. It is this
database that is actually accessed by the ECDIS for display and other navigational functions,
and is the equivalent to an up-to-date paper chart. The SENC may also contain information
from other sources.
A service provider offering ENC delivery and update service as defined in IHO standard
RENC
S52e3. Often an RENC provides both CD ROM and telecommunications-based service to
ECDIS users. One example of an RENC is an RENC in Stavanger, Norway, operating under
the marketing name PRIMAR.
8.2.2

Chart legend of S57 chart

The chart legend, which provides various data about the chart currently displayed, can be toggled on and off by
placing the cursor in the sidebar, clicking the right mouse button, choosing Chart Legend from the menu and then
pushing the thumbwheel.
This system is capable of showing more than one S57 chart at a time. This feature is called the multi-chart display.
If one S57 chart does not cover the whole display, the system will open more S57 chart cells for display, if
appropriate cells for the displayed area are available. The chart legend shows information about S57 charts
displayed on the electronic chart display area. The information is displayed with reference to own ship position if
automatic TM reset is active, or with reference to the current position of the cursor if automatic TM Reset is OFF.
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