Furuno FR-2105-B - Manual (Page 45)

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1. Press the RADAR MENU key and the [0] key to show the FUNCTIONS 2 menu.
[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 = xx.xKT (STW/SOG)
7 SET, DRIFT OFF/MAN
SET = xxx.x°
DRIFT = xx.xKT
8 INDEX LINES NO. 2 VRM/MAN
MAN = xx.xx NM
9 BRILLIANCE (1)
0 [FUNCTION 3]
*: R-type only
2. Press the [4] key to select ECHO AVERAGE.
3. Press [4] 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
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 gyrocompass signal is not available. If you wish to use this
feature without a gyrocompass signal, consult a FURUNO representative.