Furuno GP-1610CF Marker zoom display, Bottom-lock display, Bottom zoom display, Scope display

Marker zoom display

This mode expands anywhere of the normal 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 segment between the VRM and zoom range markers are expanded. The length of the segment is equal to one division of the depth scale.

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 wide layer in con- tact with the seabed is expanded onto the left half of the screen. (You may select layer width on the SOUNDER SETUP menu in the SYS- TEM menu.) This mode useful for bottom discrimination.

Fish school

This part	0
is zoomed.

Expansion range

Marker zoom display

0

100

		Fish
		school		50
	90.0
				100
	150
				150
				200
162	200
			200k
CSE 180.0°	SPD 16.8kt			2D

Normal display

VRM (white)

This part is zoomed.

Expansion range

Bottom-lock display

Fish school

		50		68.3		50
		40
				Fish
		30		school		100
		20
							150
162		10
						200
		0		200k
	CSE 180.0°		SPD	16.8kt			2D
	DEP 162m		TMP 16.0 °C			14:02
	POS 34° 26.245' N			135° 41.232' E

marker (yellow)

Normal display

DEP 162m TMP 16.0 °C	13:41
POS 34° 26.245' N 135° 41.232' E

marker (yellow)

Figure 2-17 Bottom-lock display plus

normal display

Figure 2-15 Marker zoom display

plus normal display

Bottom zoom display

This mode expands bottom and bottom fish echoes two to five times to vertical size of the screen. This mode is useful for determining bottom 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.

			100			0		Normal
				40.0
Bottom zoom								display
						50
			120
display
Bottom			140			100		Expansion
								range
							150	marker
			160
								(yellow)
	162
							200
Display is			180		200k
		CSE 180.0°	SPD	16.8kt			2D
blown up		DEP 162m	TMP 16.0 °C			14:02
three times		POS 34° 26.245' N		135° 41.232' E
larger than
normal display.

Figure 2-16 Bottom zoom display plus

normal display

Note: The expansion marker is not displayed in the defualt setting. It may be turned on in the SNDR SETUP menu in the SYSTEM menu.

A-scope display

This display shows echoes at each transmis- sion with amplitudes and tone proportional to their intensities, on the right 1/3 of the screen. It is useful for estimating the kind of fish school and seabed composition.

		0
		50	A-scope
68.3			display
		100
Normal
display		150
160 200k		200
CSE 180.0°	SPD	16.8kt	2D
DEP 160m	TMP 16.0 °C		14:02
POS 34° 26.245' N		135° 41.232' E

Figure 2-18 A-scope display (right side)

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