Furuno FR-2125V - Manual (Page 38)

1-27
[FUNCTIONS (2)]
1 [FUNCTIONS (1)]
2 BKGD COLOR
BLK(GRN CHAR)/
BLK(RED CHAR)/
BLU (ECHO AREA)
BLU/
BRT BLU
3 ECHO STRETCH OFF/1/2/3
4 ECHO AVERAGE OFF/1/2/3
5 ECHO COLOR YEL/GRN/COLOR
6 SHIP SPEED LOG/NAV/MAN
MAN = 00.0KT
(STW/SOG)
7 SET, DRIFT OFF/MAN
SET = 000.0
°
DRIFT = 00.0KT
8 INDEX LINES NO. 2 VRM/MAN
MAN = 00.00SM
9 [BRILLIANCE (1)]
0 [FUNCTIONS (3)]
Figure 1-28 FUNCTIONS 2 menu
2. Press the [4] key to select ECHO AVERAGE.
3. Press the [4] key until echo average option 1, 2, 3 or OFF as desired is highlighted.
OFF: No averaging effect
1:
Helps distinguish targets from sea clutter and suppresses brilliance of unstable
echoes.
2: Distinguishes small stationary targets such as navigation buoys.
3: Stably displays distant targets.
4. Press the [ENTER] key to conclude your selection followed by the [RADAR MENU] key
to close the FUNCTIONS menu.
(a) Echo average OFF (b) Echo average ON
Figure 1-29 Echo averaging
Echo averaging uses scan-to-scan signal correlation technique based on the true motion
over the ground of each target. Thus, small stationary targets such as buoys will be shown
while suppressing random echoes such as sea clutter. True echo average is not however
effective for picking up small targets running
at high speeds over the ground.
Echo average is inoperable when a gyrocom-
pass signal is not available. If you wish to
use this feature without a gyrocompass sig-
nal, consult a FURUNO representative.
CAUTION
Do not use the Echo Average feature
under heavy pitching and rolling; loss of
true targets can result.