Furuno FAR-2107(-BB) - Manual (Page 73)

1. RADAR OPERATION
1-51
1.30.7 Longer trails (B, C and W types)
In addition to the trail times mentioned in section 1.30.2, you may also extend
trails 12 ,24 or 48 hours.
1. Right-click the TRAIL MODE box to display the TRAIL menu.
2. Select 8 TRAIL LENGTH.
3. Select NORMAL, 12H, 24H or 48H as appropriate.
Note: 48H not available with W-type.
NORMAL: Trails are extended according to the setting made on the TRAIL
MODE box.
12H: Extend trails for 12 hours.
24H: Extend trails for 24 hours.
48H: Extend trails for 48 hours (not available on W type).
4. If you selected 12 hour, 24 hour or 48 hour, 9 TRAIL HIDE appears together
with start and end times. This item allows you to designate a time period in
which no trails will be extended. Enter time frame at START and END.
5. Push the right button to close the menu.
1.30.8 Temporarily removing trails from the display
You may wish to temporarily remove all trails from the display. Trails are
removed but are continued internally.
By keyboard: Press the [CANCEL TRAILS] key to show OFF in the TRAIL
MODE box.
By trackball: Left-click the TRAIL MODE box to display OFF in the box.
1.30.9 Trail stabilization in true motion
True motion trails may be ground stabilized or sea stabilized. The TRAIL box
shows current stabilization as TRUE-G or TRUE-S. To change stabilization mode,
open the SPEED menu and set SHIP SPEED to BT (ground stabilization) or WT
(sea stabilization).
1.30.10 Erasing trails
All trails may be erased (including those in the memory) and restarted to start
trails fresh.
By keyboard: Press and hold down the [CANCEL TRAILS] key until trails
disappear.
By trackball: Left-click the TRAIL MODE box until all trails disappear.