History Display (Target Past Position) - Furuno 1835 Operator's Manual

3. ARPA OPERATION
3.7

History Display (target past position)

This radar can display time-spaced dots (maximum ten dots) that mark the past posi-
tions of any tracked ARPA target. You can evaluate actions of a target by the spacing
between dots. Below are examples of dot spacing and target movement.
(a) Ship turning
You can select the number of history dots to display and the time interval to display
the history dots.
1. Press the MENU key to open the menu.
2. Use the Cursorpad (
3. Use the Cursorpad (
4. Use the Cursorpad (
or select [Off] to turn off the history display.
5. Press the ENTER key.
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Data box
(b) Ship running
straight
Target movement and history display
or ) to select [Target] and press the ENTER key.
or ) to select [History Dots] and press the ENTER key.
History Dots options
or ) to select number of history dots to display (5 or 10)
Vector of
your ship
Cursor
(d) Ship increased
(c) Ship reduced
speed
speed