Furuno FMD-3100 Operator's Manual page 40

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.
2-4