Furuno NAVNET 1823C - Manual (Page 59)

2. RADAR OPERATION
2-23
2.18 Echo Trails
Echo trails are simulated afterglow of target echoes that represent their
movements relative or true to own ship. This function is useful for alerting you
past possible collision situations.
Echo trail
Sample echo trails
2.18.1 Trail time
1. If not displayed, press the [HIDE/SHOW] key to show the radar soft keys.
2. Press the TARGET soft key.
3. Press the TRAIL soft key.
TRAIL
RETURN
359.9 ˚R
11.70
nm
+
TRAIL
ON /OFF
TRAIL
TIME
TRAIL
COLOR
GRAD
SINGLE
12/
H-UP
3nm
LP
319. 9 ° M
Trail soft keys
4. Press the TRAIL TIME soft key to show the trail time window.
TRAIL TIME
▲
¤ 15 seconds
¡ 30 seconds
¡ 1 minute
¡ 3 minutes
¡ 6 minutes
¡ 15 minutes
¡ 30 minutes
¡ CONTINUOUS
▼
Trail time window
5. Use the trackball to select time desired.
6. Press the ENTER soft key.
7. Press the RETURN soft key twice to finish.