Furuno GP-1650F manual Selecting sounder display mode, Bottom-zoom display, Marker zoom display

Selecting sounder display mode

There are five display modes from which to choose: normal, marker zoom, bottom zoom, bottom lock and A-scope. To select a display, press the soft key SNDR FUNC on the nor- mal sounder display to show the sounder function window, and press ▲ or ▼ to select the display. Press the soft key RETURN to close the window.

Bottom-zoom display

This mode expands bottom and bottom fish echoes two to five times to vertical size of the screen, and is useful for determining bot- tom hardness. A bottom displayed with a short echo tail usually means it is a soft, sandy bottom. A long echo tail means a hard bot- tom.

SOUNDER FUNCTION

▲

'NORMAL

Bottom zoom display

1000

40.0

12050

Normal sounder display

™MARKER ZOOM

™BOTTOM ZOOM

™BOTTOM LOCK

Bottom

140

100

Zoom marker

™A-SCOPE

▼

160150

(yellow)

Figure 2-6 Sounder function window

162 180

DGPS3D200k

200

Marker zoom display

This mode expands a selected area of the normal sounder 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 marker is expanded. The length of the segment is equal to one divi- sion of the depth scale.

Figure 2-8 Bottom-zoom display plus

normal sounder display

Bottom-lock display

The bottom-lock display provides a com- pressed normal picture on the right half of the screen and a 5 or 10 meter (10 or 20 feet) wide layer in contact with the bottom is expanded onto the left half of the screen. This mode is useful for bottom discrimination.

Marker zoom display

Fish school
		0	Normal
	100		sounder
	Fish		display
	school	50	VRM
	90.0	100	(white)
	150
		150	This part
			is zoomed.
162	200	200
			Zoom marker
DGPS3D	200k
			(yellow)

		This part	0	Zoom
Bottom-lock		is zoomed.		marker
	50
				(yellow)
display		68.3	50
	40
		Fish
	30	school	100	Normal
				sounder
Fish	20		150	display
school	10
162
			200
	0
DGPS3D	200k

Figure 2-9 Bottom-lock display plus normal sounder display

Figure 2-7 Marker-zoom display

plus normal sounder display

Note: The zoom marker is not displayed in the default setting. It may be turned on in the DISPLAY SETUP2 menu. For further details see “ZOOM MARKER” on page 9-4.

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