Past Position Display; Displaying And Erasing Past Position Points, Choosing Past Position Plot Interval - Furuno FAR21x7 & BB FAR28x7 Operator's Manual BB FAR28x7 Operator's Manual

3.10

Past Position Display

The ARP displays equally time-spaced dots marking the past positions of any
targets being tracked.
A new dot is added every minute (or at other preset time intervals) until the
preset number is reached. If a target changes its speed, the spacing will be
uneven. If it changes the course, its plotted course will not be a straight line.
(a) Ship turning
3.10.1 Displaying and erasing past position points, choosing past
position plot interval
1. Roll the trackball to choose the PAST POSN box at the right side of the
screen.
2. Push the left button to choose plot interval desired: OFF, 30 seconds, 1, 2, 3
or 6 minutes. Choose OFF to erase all past position points and deactivate
the past position display.
(b) Ship running
(c) Ship reduced
straight
speed
Past position display
PAST POSN REL
PAST POSN box
3. ARP OPERATION
(d) Ship increased
speed
2MIN
3-19