Furuno GP-1850WDF manual Sounder Display Description, Normal sounder display indications, markers

2. VIDEO SOUNDER OPERATION

2.2Sounder Display Description

The figure below shows all indications and markers which may appear on the normal sounder display.

Normal sounder display indications, markers

							Functions for
			Variable				soft keys
			Range
Nav information			Marker
window			(white)			Depth scale
	34°	12.345' N		CSE	245.8°		SOUNDER
Minite	135° 12.345' E			SPD	16.3kt
mark	F				15.0		RANGE
Color
	80					20
bar
							GAIN
Temp.	60					30
scale							SHIFT
Water	40					40
temp.							MODE/
Graph						50	FREQ
	30.0
Water							SNDR
	GPS 3D		50k				FUNC
temp.
display			Tx frequency				Depth

GPS status

Indications on the normal sounder display

Note: The water temperature graph can be turned on or off. (See TEMP GRAPH on page 11-4.) The temperature scale is fixed between 20-80°F (0 to 30°C).

The normal sounder display shows either the 50 kHz picture or 200 kHz picture. To switch between these pictures, do the following:

1.Press the [SNDR] key several times to show the normal sounder display.

		SOUNDER
		RANGE
30		20
		GAIN
20		30
		SHIFT
		40
		MODE/
0		FREQ
		50
		SNDR
GPS 3D	50k	FUNC

Normal sounder display

2.Press the MODE/FREQ soft key. The display changes as below.

	MODE/FREQ 0.0	0	SOUNDER
			SELECT
	▲
			50kHz
	AUTO CRUISING
		50
	AUTO FISHING		SELECT
	MANUAL		200kHz
	▼
		100
DGPS 3D	50k	150	RETURN

Mode/freq window

3.Press the SELECT 200kHz (or SELECT 50kHz) soft key.

4.Press the RETURN soft key to manually close the window, or wait 10 seconds and the window automatically closes.

50 kHz picture

The sounder uses ultrasonic pulses to detect bottom conditions. The lower the frequency of the pulse, the wider the detection area. Therefore, the 50 kHz frequency is useful for general detection and judging bottom condition.

200 kHz picture

The higher the frequency of the ultrasonic pulse the better the resolution. Therefore, the 200 kHz frequency is ideal for detailed observation of fish school.

50 kHz

200 kHz

Comparison of transducer frequencies

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