Furuno FMD-3200 Operator's Manual page 46

2. OPERATIONAL OVERVIEW
ARCS raster format
ARCS charts are digital reproductions of British Admiralty (BA) paper charts. They re-
tain the same standards of accuracy, reliability and clarity as paper charts.
Zooming into the ARCS chart can be useful for magnifying a complex detail, however
this decreases the density of the data displayed, and can give a false impression of
the distance from danger.
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