Furuno NAVNET 1833 - Manual (Page 162)

4. VIDEO SOUNDER OPERATION
4-16
4.9.2 Advancement synchronized with ship’s speed
With speed data provided by a speed-measuring device, picture advance speed
may be automatically synchronized with ship’s speed. As shown in the figure
below the horizontal scale of the display is not influenced with the
speed-dependent picture advance mode active, thus it permits judgment of fish
school size and abundance at any speed. With the advancement synchronized
with ship’s speed the picture advance speed setting (on the previous page) is
ignored.
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.
How the speed-dependent picture advance mode works
Activating/deactivating the speed-dependent picture advance mode
1. Press the [MENU] key followed by the SOUNDER MENU soft key.
2. Select SPD SENSING PIC ADV.
3. Press the EDIT soft key to open the setting window.
4. Use the trackball
to select ON or OFF (default setting) as appropriate.
5. Press the ENTER soft key followed by the [MENU] key to close the menu.
Note:
Use the same speed data sentence (STG or STW) throughout the network
for smooth advancement of the sounder picture. See the paragraph 6.5 for
how to output data through the network.