Furuno 1834C-BB ユーザーズマニュアル

4. VIDEO SOUNDER OPERATION 

PICTURE ADVANCE

▲

2/1
1/1
1/2
1/4
1/8
1/16
STOP

▼

4. Use the Trackball

 

to select speed desired. The fractions in the window denote the 

number of scan lines produced per transmission. For example, 1/8 means one scan line 
is produced every eight transmissions. STOP freezes the display and it is convenient for 
observing an echo. 

5.  Press the E: RETURN soft key followed by the MENU key to close the menu. 
 
Note:

 When using the plotter/sounder combination display, advancement of the sounder 

picture may be temporarily interrupted while the plotter display is being shifted or its display 
range is being changed. 
 

With speed data provided by a speed-measuring device, picture advance speed may be set 
according to ship’s speed, the ship’s speed dependent mode. As shown in the figure below 
the horizontal scale of the display is not influenced by the change of ship’s speed, thus the 
speed-dependent picture advance permits judgment of fish school size and abundance at 
any speed. The choice “SPD SENSING PRR” means the ship’s speed dependent mode, 
where the PRR changes automatically with ship’s speed.   

FULL

SPEED

HALF

SPEED

Actual

 Movement

Same

 size

fish

 schools

Speed

Normal

 Mode

Speed-Dependent

 Picture Advance Mode

Fish

 school shrinks as speed

is

 increased; expanded

as

 speed is decreased.

Fish

 schools are shown

same

 size regardless

of

 ship's speed.