Furuno GP-1600F manual Normal video sounder displays, KHz display

3.2 Video Sounder Displays

The GP-1600F provides four types of video sounder displays and two transmission frequencies. Each display and frequency has its advantages and disadvantages. You should choose them according to current sea area and target fish.

Normal video sounder displays

50 kHz display

The lower the transmission frequency the wider the coverage and the longer the detecting range. The 50 kHz display, because of its wide beamwidth, is useful for long range detection and general sounding. It is especially useful for discerning seabed hardness; the wider the seabed echo the harder the seabed.

200 kHz display

The narrow beamwidth of the 200 kHz transducer provides a sharp, clear cut picture, making it perfect for detailed observation of small fish schools. However, signal loss is higher and sounding ability is lower than the 50 kHz transducer.

50 kHz

0

40

		58.3
				80
					120
				160
132
			50k
CSE 180.0°	SPD	16.8kt			3D
DEP 113.6 ft	TMP 16.0 °C			12.0V
POS 34° 26.245' N		135° 41.232' E

200 kHz

0

40

		58.3
				80
					120
				160
132
			200k
CSE 180.0°	SPD	16.8kt			3D
DEP 113.6 ft	TMP 16.0 °C			12.0V
POS 34° 26.245' N		135° 41.232' E

Figure 3-2 Comparison of 50 and 200 kHz video sounder pictures

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