Furuno FCR-2107-D Manual De Usuario

2. Radar Operation 

(a) True target trails (no 

smearing of stationary 
targets)

(b) Relative target trails 

Target moving relative 
to own ship

The trails of the radar echoes of targets may be displayed in the form of synthetic afterglow. Target trails are 
selected either relative or true and may be sea or ground stabilized. True motion trails require a compass signal, 
position and  speed inputs.  

You can display echo trails in true or relative motion. 
Relative trails show relative movements between targets 
and own ship. True motion trails require a gyrocompass 
signal, speed data and position data. 

The reference for the past position displays for AIS and 
TT is also switched whenever trail reference is switched. 

1.  Use the trackball to place the arrow on the TRAIL 

MODE box at the bottom right corner of the screen. 

2.  Spin the scrollwheel to select TRUE or REL as 

appropriate then push the scrollwheel. 

Trail time, the trail plotting interval, may be selected as follows: 

1.  Use the trackball to place the arrow on the TRAIL TIME box at bottom-right corner on the screen. 

2.  Push the left button, TRAILS key or the scrollwheel to choose trail time, referring to the table below. The 

longer the trail interval, the longer the lengths of the target trail 

Left button, TRAILS key 

OFF, 15 sec, 30 sec, 1 min, 3 min, 6 min, 15 min, 30 min, CONT(inuous)

Scrollwheel 

OFF, 15 sec, 30 sec, 1-30 min (30 sec intervals), CONT(inuous)  

The timer above the TRAIL MODE box counts up the trail time and is erased once the terminal count is reached. 
For example, if the trail time is six minutes, the timer is erased when trails have been plotted six minutes. The 
maximum time for continuous plotting is 99:59. When the timer counts to 99:59, the timer is reset to zero, all target 
trails are erased then trails are restarted. 

You can clear all target trails to restart the trail process. Target trails are cleared and the trailing process restarts 
from time count zero at the current target trail plot interval. 

1.  Use the trackball to place the arrow on the TRAIL TIME box at the bottom right corner of the screen. The 

guidance area reads "Trail SEL/L=Delete / OK /. 

2.  Long-push the left button or the CANCEL TRAILS key to reset target trails. 

Trails can be temporarily removed as follows: 

1.  Use the trackball to select the TRAIL TIME box at the bottom right corner of the screen. 

2.  Push the left button to display OFF.