Furuno CH-37 - Manual (Page 52)

3-8
3.9 Bottom/3D Menu Operation
Basic procedure
1. Press the MENU key on the sub panel 2.
2. Select BOTTOM/3D with the arrow keys in the sub panel 2.
3. Select item and setting with the arrow keys. The selected
item is highlighted and the current setting is circumscribed
in white.
4. To return to the BOTTOM/3D menu, press the menu key
again.
MENU : SONAR BOTTOM/3D DUAL E/S
TVG (LEVEL) : 3.0
TVG (TIME) : 3.0
BEAM WIDTH : NAR WIDE
AUTO TRAIN SECTOR : 90 180 360
VERT. ECHO OVERLAY : OFF ON
3D VIEW SCALE : TIME DIST
TIME SCALE : 1/1 1/2 1/4
(or DISTANCE SCALE 500 1000)
EXIT : PRESS MENU KEY
Figure 3-9 Bottom/3D menu
Bottom/3D menu description
TVG (Level): Controls the receiver sensitivity in short to me-
dium ranges to eliminate surface noise, which may mask shal-
low targets.
TVG (Time): Determines the TVG effective depth.
BEAM WIDTH: Sets the vertical beam width. Select narrow for
general use. The wide beam width is useful for searching a
wide area vertically but fish detection range is shortened since
the transmitted power attenuates.
AUTO TRAIN SECTOR: Sets the train sector; 90
°
, 180
°
, or
360
°
. Use a wide sector to conduct a general search, narrow-
ing it once a fish school is detected.
VERT. ECHO OVERLAY: Turns the E/S combination display
on/off. (Requires external E/S.)