Reference Position - Furuno FAR-2807 Operator's Manual

1.50

Reference Position

The reference position for measurements (range, bearing, etc.) and markers
(heading line, stern mark, etc.) can be antenna position or consistent common
reference point (CCRP), which is a location on own ship to which all horizontal
measurements, for example range, bearing, relative course, relative speed,
closest point of approach (CPA) or time to closest point of approach (TCPA), are
normally referenced
To select reference position, right-click the REF POINT indication at the top of
the screen to select ANT or CCRP as applicable.
The position of the own ship marker changes according to reference position as
shown below. If the CCRP is positioned outside of the effective display area, the
bearing scale is indicated with the appropriate reduced detail.
Radar antenna
position is at
center of display
Range and bearing are measured and graphics are drawn according to
reference position as in the table below.
Category
Range and bearing
measurement
Graphics
.
X
ANT position
Markers, measurements and reference point
Item
EBL
VRM
Cursor
PI line
Range ring
Drop mark
Heading line
Stern mark
Beam line
Own ship vector
Own ship track
1. RADAR OPERATION
X
Conning position is at
center of display
CCRP position
Reference point
CCRP
Range and Range and bearing
bearing measured from
measured from antenna position
CCRP
Drawn from Drawn from
CCRP antenna position
Antenna position
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