Furuno FCV-600L manual 49.6, 28.2, Marker-zoom display, Dual-frequency display

		50k
			0
	0.0
Fish		20
school		40

Bottom

60

Marker-zoom display

This mode expands selected area of the nor- mal picture to full vertical size of the screen on the left-half window. You may specify the portion to expand by operating the VRM (Variable Range Marker), which you can shift with ▲ or ▼. The area between the VRM and zoom range marker is expanded. The length of the segment is equal to one division of the depth scale.

49.680

Figure 1-7 Typical 50 kHz normal display

200 kHz

The higher the frequency of the ultrasonic pulse the better the resolution. Therefore, the 200 kHz frequency is ideal for detailed ob- servation of fish schools.

Dual-frequency display

15

20

Zoomed fish school

25

28.2

0

10

14.7

Fish

school

20

30

40

Normal display

Variable range marker (green)

This section is zoomed

The 50 kHz picture appears on the left; the

Marker-zoom

200 kHz picture on the right. This display is useful for comparing the same picture with

display

Zoom marker (yellow)

two different transmitting frequencies.

0	50/200	0
	0.0
50 kHz	200 kHz
picture	picture
20		20
40		40
60
49.6		80

Figure 1-8 Dual-frequency display

Figure 1-9 Marker-zoom display

plus normal display

4