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Furuno 1945C Manual

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4. VIDEO SOUNDER OPERATION
4-7
4.2.3 How to enable automatic sounder operation
1. If not displayed, press the HIDE/SHOW key to show the sounder soft keys.
2. Press the AUTO/D. BOX soft key.
AUTO MODE
▲
CRUISING
FISHING
OFF (MANUAL)
▼
Mode/frequency window
3. Use the Trackball or the ENTER knob to select CRUISING or FISHING as appropriate.
4. Press the RETURN soft key.
4.3 Manual Sounder Operation
Manual operation is useful for observing fish schools and bottom using a fixed gain setting.
The gain, range and range shift functions used together give you the means to select the
depth you can see on the screen. The basic range can be thought of as providing a
“window” into the water column and range shifting as moving the “window” to the desired
depth.
4.3.1 Selecting the manual mode
1. If not displayed, press the HIDE/SHOW key to show the sounder soft keys.
2. Press the AUTO/D. BOX soft key to show the mode/frequency window.
3. Select OFF (MANUAL).
4. Press the RETURN soft key.
4.3.2 Selecting display range
Press the [RANGE +] or [RANGE -] key to select a range. The default ranges in feet, meters,
fathoms and passi/braza are as below. Note that the range cannot be changed in the
automatic sounder mode.
Default sounder ranges
Range 8 Range 1 Range 2 Range 3 Range 4 Range 5 Range 6 Range 7
ETR-6/10N ETR-30N
15 ft 30 ft 60 ft 120 ft 200 ft 400 ft 1000 ft 4000 ft 4500 ft
5 m 10 m 20 m 40 m 80 m 150 m 300 m 1200 m 1500 m
3 fa 5 fa 10 fa 20 fa 40 fa 80 fa 150 fa 650 fa 900 fa
3 P/B 5 P/B 10 P/B 30 P/B 50 P/B 100 P/B 200 P/B 700 P/B 900 P/B
… 128 …


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