To set Alarm Sounds: Press ↓ to ALARM SOUNDS. With the option high- lighted, press ENT to check it (turn on) and uncheck it (turn off.) After the option is set, press EXITEXIT to return to the page display.

To set Alarm Volume: Press ↓ to VOLUME. Press → or ← to move the bar. The left end of the scale is low volume; the right end is high volume. After the option is set, press EXITEXIT to return to the page display.

To set Alarm Style: Press ↓ to ALARM STYLEENT. Press ↑ or ↓ to change the style, then press ENT. After the option is set, press EXITEXIT to return to the page display.

Track Smoothing

This is a factory setting on the GPS Setup menu that should always be left on. When stopped or traveling at slow speeds, like walking or troll- ing, Track Smoothing prevents wandering of trails, the steering arrow, compass rose and a map in track-up mode.

Track Smoothing option, turned on.

Trail Options

There are several options you can use with trails. Some affect all trails, other options can be applied to a particular trail. You can change the way trails are updated, display or hide trails, create a new trail, delete a trail, etc.

General Trail Options

To access the Trails Menu press MENUMENU↓ to MY TRAILSENT.

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Eagle Electronics 640c manual Track Smoothing, Trail Options, To access the Trails Menu press MENUMENU↓ to MY Trailsent
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640c 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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