Raytheon Pathfinder ECDIS Operator's Manual page 76

4.3 INFO / SELECT
Allows you to select and view the different charts you have available for the
world or the currently displayed region.
4.3.1 Info / Select − S57 + CM93/3 − Chart Type
Info about S57 and CM93/3 Chart Type
The C−MAP 93/3 Database is a seamless product. It consist of different scale
layers, corresponding to as many navigational purposes of S57 and 93/3; each
layer includes electronic charts with similar compilation scale, organized into a
continuous coverage. The following scale layers are defined:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Where an overlapping between two charts into the same scale layer occurs, this
is resolved giving priority to one chart, according to the following criteria:
If an ENC data set overlaps a non−ENC data set, the ENC data set takes
precedence.
If two ENC data sets overlaps with each other, the one that was issued latest
takes precedence. The other data set may remain included in the S57 Database,
but it is no longer regarded as an ENC, since it violates one of the fundamental
principles S57 (i.e. the exclusivity of data).
3655DOC020102
Operator Manual
Background, small scal
Background, medium scale
Overview
General
Coastal
Approach
Harbor
Berthing
4−4
Edition: 30.MAR.2007