Furuno FR-2125V Operator's Manual page 38

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.
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.
[FUNCTIONS (2)]
1 [FUNCTIONS (1)]
2 BKGD COLOR
3 ECHO STRETCH OFF/1/2/3
4 ECHO AVERAGE OFF/1/2/3
5 ECHO COLOR
6 SHIP SPEED
7 SET, DRIFT
8 INDEX LINES
9 [BRILLIANCE (1)]
0 [FUNCTIONS (3)]
Figure 1-28 FUNCTIONS 2 menu
(a) Echo average OFF (b) Echo average ON
Figure 1-29 Echo averaging
BLK(GRN CHAR)/
BLK(RED CHAR)/
BLU (ECHO AREA)
BLU/
BRT BLU
YEL/GRN/COLOR
LOG/NAV/MAN
MAN = 00.0KT
(STW/SOG)
OFF/MAN
SET = 000.0
DRIFT = 00.0KT
NO. 2 VRM/MAN
MAN = 00.00SM
CAUTION
Do not use the Echo Average feature
under heavy pitching and rolling; loss of
true targets can result.
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