2.10 Erasing Weak Echoes

Dirty water or reflections from plankton may be painted on the display in green or light blue. These weak echoes may be erased as follows:

1.Press the [MENU] key and the soft key

SOUNDER SETUP OPTIONS.

2.Select SIGNAL LEVEL, and press the soft key EDIT to show the signal level window.

2.11 White Marker

The white marker functions to display a par- ticular echo color in white. For example, you may want to display the bottom echo (red- dish-brown) in white to discriminate fish ech- oes near the bottom. Note that the bottom must be displayed in reddish-brown for the white marker to function.

1. Press the [MENU] key and the soft key

SOUNDER SETUP OPTIONS.

SIG LVL

▲

'OFF ™SL1 ™SL2 ™SL3 ™SL4 ™SL5

™SL6

▼

At 16-color display

SIG LVL

▲

'OFF ™SL1 ™SL2

™SL3

▼

At 8-color display

2. Select WHITE MARKER, and press the

soft key EDIT to open the white marker

window.

WHITE MARKER

▲

3

▼

Figure 2-26 White marker window

(See page 2-9.)

Figure 2-24 Signal level window

3.Press ▲ or ▼ to select level of erasure; OFF or signal level among SL1 to SL6 (or SL3). The higher the number the stron- ger the echo will be erased.

4.Press the soft key RETURN and the [SNDR] key to finish.

Weak echoes

Figure 2-25 Appearance of weak echoes

3.Press ▲ or ▼ to select color to display in white. As you press ▲ or ▼ , the number (corresponds to echo number) in the marker window changes, the white marker on the color bar shifts and selected echo color is displayed in white. When you select 8 in HUE window (See page 2-9.), white marker is among 0 to 8.

White marker shows

← color currently displayed in white.

Figure 2-27 Color bar when white

marker function is active

4.Press the soft key RETURN and the [SNDR] key to finish.

To turn the white marker function off, display “0” in the white marker window.

2-8

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Furuno GP-1850DF, GP-1850F manual Erasing Weak Echoes, White Marker
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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.
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