Map Page showing position on Bull Shoals Lake, Arkansas. The full

map option (left). Map with sonar option (right).

Map Page is also the default screen that appears when you turn on the unit. To get to the Map Page from another page press PAGES ← → to MAPEXIT.

You can display a split screen showing both the Map and Sonar pages at the same time. This feature is discussed in Sec. 4, Sonar Options & Other Features.

The Map Page represents a GPS function, so it is discussed in much greater detail in Sec. 6.

Sonar Page

The Sonar Page displays the sonar chart. This is a cross-section view of the water column beneath the boat. The chart moves across the screen, displaying sonar signal echoes that represent fish, structure and the bottom.

To get to the Sonar Page press the PAGES key, then use ← → to select SONAR. The Sonar Pages Menu offers four chart display options: Full So- nar Chart, Split Zoom Sonar Chart, Split Frequency Sonar Chart and Digital Data. From the Sonar Page menu you can select one of the chart options by pressing ↓ to the desired displayEXIT.

The Sonar Page also has its own menu, which is used for some advanced functions and for setting various options. Sonar Options and other fea- tures are discussed in Sec. 4. To Access the Sonar Page menu, from the Sonar Page press MENU.

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Eagle Electronics 640C, 640cDF manual Sonar
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640c, 640C, 640cDF specifications

Eagle Electronics has made a significant mark in the world of marine electronics with its innovative and reliable products, notably the Eagle Electronics 640C, 640cDF, and the 640c models. These devices are designed for anglers and navigators who seek advanced functionality combined with user-friendly operation.

The Eagle Electronics 640C is a high-performance fish finder that is primarily admired for its vibrant display and precise mapping capabilities. Equipped with a 640x480 pixel, full-color LCD screen, it provides crystal-clear visibility even in bright sunlight. This device uses advanced sonar technology to offer detailed underwater images, allowing users to locate fish with remarkable accuracy. The high-resolution graphics enhance the experience while providing an intuitive interface for easy navigation through its various features.

The 640cDF, a variant of the 640C, elevates the standard fish finder experience by incorporating dual-frequency sonar capabilities. This model operates on both 200 kHz and 83 kHz frequencies, allowing users to switch between narrow and wide beams based on their fishing needs. The dual-frequency technology provides a more comprehensive view of the underwater environment, making it easier to identify different types of fish and underwater structures. Additionally, the 640cDF boasts temperature sensing capabilities, giving anglers valuable data regarding water conditions that can influence fish behavior.

All models in the Eagle 640 series feature built-in GPS navigation. The integrated GPS provides a reliable mapping system that allows users to mark waypoints and create routes, significantly improving navigation efficiency. This technology is vital for those who engage in long-distance fishing trips or travel in unfamiliar waters. The GPS functionality, combined with the sonar capabilities, makes these devices essential tools for successful fishing excursions.

Furthermore, the Eagle 640 series devices come equipped with customizable display options, allowing users to tailor the information presented based on their preferences. The intuitive menu system simplifies the navigation of the device's various features, empowering users to quickly access critical data without unnecessary complications.

In summary, the Eagle Electronics 640C, 640cDF, and the 640c represent a blend of cutting-edge technology and user-centric design in the marine electronics space. With features such as high-resolution displays, dual-frequency sonar, built-in GPS navigation, and customizable settings, these devices enhance the fishing experience, making them invaluable assets for anglers and navigators alike.
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