Furuno 1732C, 1753C, 1742 Marker-zoom display plus normal sounder display, Bottom-zoom display

4. VIDEO SOUNDER OPERATION

Marker-zoom display

The marker-zoom display 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 the [ENTER] knob. The area between the VRM and zoom marker is expanded. The length of the segment is equal to one division of the depth scale.

Fish school

	-		0'20"
42				0	-
		Fish
	-	school			-
44					-
	-		42.0		-
46			50 -
48	-				-
	-				-
50					-
80	-	HF	100-
					-

VRM

(White on color model)

This part is zoomed.

Zoom marker

MARKER-ZOOM NORMAL

DISPLAYDISPLAY

Marker-zoom display plus normal sounder display

Bottom-zoom display

The bottom-zoom display expands bottom and bottom fish echoes by the zoom range selected on the sounder range setup menu (see paragraph 5.9.3). A bottom displayed with a short echo tail usually means it is a soft, sandy bottom. A long echo tail means a hard bottom.

	40	-		0	-
					-
			20.0
		-			-
		-			-
	50	-		50
Bottom		-			-	Zoom marker
		-			-
					-
		-			-
		-		100	-
	60	-
					-
80			HF
		-

BOTTOM-ZOOM NORMAL DISPLAY

DISPLAY

Bottom-zoom display plus normal sounder display

4-5