11-9, System Setup soft key | Furuno GP-1850F, GP-1850DF specification

4.Select a range, ZOOM RANGE or B/L RANGE, and press the soft key EDIT. ZOOM RANGE selects the range to zoom in the marker and bottom zoom modes. The setting range is 7 to 5000 feet, and the default setting is 30 feet. B/L RANGE sets the expansion width for the bottom- lock display, 10 or 20 feet. The default setting is 20 feet.

5.Adjust the range with the cursor pad.

6.Press the soft key RETURN to go back to the RANGE SETUP menu.

TVG 200kHz, TVG 50kHz: TVG (Time Var- ied Gain) compensates for propagation at- tenuation of the ultrasonic waves. It does this by equalizing echo presentation so that fish schools of the same size appear in the same density in both shallow and deep waters. In addition, it reduces surface noise. Note that if the TVG level is set too high short range echoes may not be displayed.

Fish school A

SYSTEM SETUP soft key

The system setup menu provides functions for selection of fish alarm sensitivity, TX power selection, TVG adjustment, echo level offset and seabed echo offset.

1.Press the [MENU] key.

2.Press the soft key SOUNDER SETUP OPTIONS.

3.Press the soft key SYSTEM SETUP.

Fish school B

Figure 11-17 TVG concept

ECHO OFFSET 200kHz, ECHO OFFSET 50kHz:

If the on-screen echo level appears to be too weak or too strong and the level cannot be adjusted satisfactorily with the gain control, adjust echo offset to compensate for too weak or strong echoes. The default setting for both

sFISH ALM LVL	NORMAL
TX POWER	ON
TVG 200kHz	5
TVG 50kHz	5
ECHO OFFSET 200kHz	+00
ECHO OFFSET 50kHz	+00
SEABED LVL 200kHz	80
SEABED LVL 50kHz	80

SYSTEM

SETUP

EDIT

200 kHz and 50 kHz is zero.

SEABED LVL 200kHz, SEABED LVL 50kHz:

If the depth indication is unstable in automatic operation or the bottom echo cannot be dis- played in reddish-brown by adjusting the gain control in manual operation, you may adjust

		RETURN
DGPS 3D		RETURN
DGPS 3D

Figure 11-16 System setup menu

SYSTEM SETUP menu description

FISH ALM LVL: Sets the fish alarm sensitiv- ity; namely, which echo strength will trigger the alarm. HIGH, only the strongest echoes trigger the alarm; NORMAL, echoes from strong to medium strength trigger the alarm, LOW, any echo triggers the alarm. The de- fault setting is NORMAL.

TX POWER: Turns TX power on/off. The default setting is ON.

the bottom echo level detection circuit, for both 50 kHz and 200 kHz, to stabilize the in- dication. Note that if the level is set too low weak echoes may be missed and if set too high the depth indication will not be displayed. The default setting for both 200 kHz and 50 kHz is 80.

11-9

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, GP-1850DF 11-9, System Setup soft key, Echo Offset 200kHz, Echo Offset 50kHz

Models: GP-1850F GP-1850DF