Furuno FSV-25 Operator's Manual page 109

Mark Display menu
The [Mark Display] menu turns on/off marks. Click [Mark Display] on the [Initial Set-
ting] menu to show the [Mark Display] menu.
Mark, description
[Heading Mark]: The heading mark is a dashed line which
indicates the heading in all presentation modes. It extends
from own ship position to the outer edge of the display and
appears at zero degrees in the head-up mode. It changes
the orientation depending on ship's orientation in the north-
up, course-up and true motion modes.
[Range Rings]: The range rings are the dotted line circles
about own ship, and they provide an estimate of the range
to a target. Rings appear every distance of 1/2 or 1/4 of the
range depending on menu setting. The number of range
rings to display can be set with [Range Ring Interval]. See
[Range Ring Interval] on page 6-11.
[Bearing Scale]: The bearing scale is the concentric solid
circle at the edge of the display. It provides an estimate of
the bearing to a target. The scale can be turned on or off
and its degree of division selected.
[Coarse]: Puts a division mark every 10° and has no numer-
ic indication.
[Fine]: Puts a division mark every 1° and has numeric indi-
cation every 10°.
[Own Ship's Track Plot]: Traces ship's movement with a
solid line. When the track memory becomes full, the earliest
track is automatically erased to trace new track. Requires
speed and course data.
Mark Display
Heading Mark : ON
Range Rings : ON
Bearing Scale : ON
Own Ship's Track Plot : ON
Data on Track : ON
Net Move Plot : ON
Fish Mark Connect : ON
Target Vector : ON
Fish Track Plot : On
EVENT Key : Event
Histogram Disp : ON
Mark Color : White
TD Position Mark : ON
6. OTHERS MENU
Quit
Mark appearance
Heading
mark
R200
100
6-9