For the purpose of these performance standards:
3.1
Electronic Chart Display and Information
System (ECDIS) means a navigation information system which
with adequate back-up arrangements can be accepted as complying with
the up-to-date chart required by regulations
V/19 and V/27 of the 1974
SOLAS Convention, as amended, by displaying selected information from
a system electronic navigational chart (SENC) with positional information
from navigation sensors to assist the mariner in route planning and
route monitoring, and if required display additional navigation-related
information.
3.2
Electronic Navigational Chart (ENC) means
the database, standardized as to content, structure and format, issued
for use with ECDIS by or on the authority of a Government, authorized
Hydrographic Office or other relevant government institution, and
conform to IHO standards. 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)
which may be considered necessary for safe navigation.
3.3
System Electronic Navigational Chart
(SENC) means a database, in the manufacturers internal ECDIS
format, resulting from the lossless transformation of the entire ENC
contents and its updates. It is this database that is accessed by
ECDIS for the display generation and other navigational functions,
and is equivalent to an up-to-date paper chart. The SENC may also
contain information added by the mariner and information from other
sources.
3.4
Standard Display is the display
mode intended to be used as a minimum during route planning and route
monitoring. The chart content is listed in appendix 2.
3.5
Display Base means the chart
content as listed in appendix 2 and
which cannot be removed from the display. It is not intended to be
sufficient for safe navigation.
3.6 Further information on ECDIS definitions may
be found in IHO Hydrographic Dictionary Special Publication S-32 (see appendix 1).