Furuno FSV-85 Operator's Manual page 143

Mark Display menu
The [Mark Display] menu turns on/off marks. Select [Mark Display] on the [Initial Set-
ting] menu then push the left-click button.
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.
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.
Own Ship's Track Plot: Traces ship's movement with a
solid line. When the capacity of the track memory is ex-
ceeded the earliest track is automatically erased to trace
new track. Requires speed and course data.
7. OTHERS MENU
Heading
mark
R200
100
7-9