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

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

2-3

GP-1850F, GP-1850DF specifications

Furuno is renowned for its high-quality marine electronics, and the GP-1850DF and GP-1850F are no exceptions. These advanced GPS chart plotters are designed to meet the needs of both professional mariners and recreational boaters alike.

The GP-1850DF is equipped with a powerful 12-channel GPS that provides fast and accurate positioning information, while the GP-1850F features a sturdy built-in fish finder, making it ideal for anglers. Both units boast a brilliant color display that enhances visibility in various lighting conditions, ensuring that users can easily read information on the screen, even in direct sunlight.

One of the standout features of these models is their compatibility with a variety of chart formats, including C-MAP, and Furuno’s proprietary raster charts. This flexibility allows users to choose from a broad range of navigational charts, catering to specific regional needs and preferences. The intuitive interface of the GP-1850 series simplifies navigation, offering menu-driven commands and support for multiple languages.

Furuno has integrated advanced sonar technology in the GP-1850F model, including a high-resolution fish finder capable of detecting fish signatures with remarkable precision. The dual-frequency capabilities enable users to switch between higher frequencies for shallow water fishing and lower frequencies for deeper waters. This enriches the fishing experience while improving catch rates.

Moreover, both devices feature a built-in waypoint register, allowing users to store up to 1,000 waypoints, which can be essential for returning to promising fishing spots or navigating back to port. The navigation functions also include routes and track recording, empowering boaters to create custom paths and review their previous journeys.

The GP-1850 series also places a high emphasis on safety, incorporating features like man overboard (MOB) alarms and route alarms to enhance on-water safety. Additionally, they are designed to withstand the harsh marine environment, with waterproof housings that ensure durability during adverse weather conditions.

In conclusion, the Furuno GP-1850DF and GP-1850F models provide an exceptional combination of performance, reliability, and user-friendly features, making them a preferred choice for both fishermen and navigators. Their adaptability in various maritime situations, alongside advanced technologies, cements their reputation as essential tools for successful and safe voyages on the water.

Furuno GP-1850F manual Selecting sounder display mode, Bottom-zoom display, Marker zoom display

Models: GP-1850F GP-1850DF