531526-1_A - 747c_&_777c2_Man_Eng.qxp 10/2/2006 1:42 AM Page 91

Structure: Structure is a general term for objects on the bottom that present a discontinuity and are a likely attractor for fish. This includes bottom contour features (drop-offs, humps, and holes), standing structure (stumps, timbers, brush piles) and a wide range of other potential objects (sunken boats, reefs). Humminbird® units excel at showing structure with great detail over a wider area due to unique sonar configurations developed for the angler.

Structure ID®: Structure ID® is a Humminbird® feature that describes the traditional grayscale method of presenting sonar information. See Grayscale.

Surface Clutter: Surface Clutter is a phenomenon where sonar returns are reflected off of tiny objects near the surface of the water, including algae and even air bubbles. Typically, saltwater environments have significantly greater surface clutter than freshwater due to continuous wind and wave action that causes aeration at the surface. The Surface Clutter menu provides manual control to bias the default settings under extreme conditions.

Target Separation: Target Separation is the measurement of minimum distance that a fishfinder needs to be able to recognize two very close objects as two distinct targets (i.e. two fish hanging very close, or a fish hanging very close to structure). Humminbird® fishfinders provide a very good 2 1/2 inches of target separation in shallower than 100 feet of depth. Target separation decreases as depth increases due to the need for longer Pulse Width to achieve greater depth. See Pulse Width.

Thermoclines: Thermoclines are water layer(s) of distinctly different temperatures that create a sonar reflection due to the density of the differing water temperatures. Typically a thermocline will appear as a continuous band across the display at some distance above the bottom contour. Thermoclines are of interest to anglers because fish will suspend above or below the thermocline as they seek the optimum temperature and oxygen levels.

Time Variable Gain: Time Variable Gain is a processing step applied to the sonar return to "normalize" the data so that objects of equal size (i.e. fish) appear to be the same size, even if they are separated by a good distance. Time Variable Gain is a fundamental attribute of good sonar, but is often promoted as a feature.

Total Screen Update®: A Humminbird® feature that refreshes and updates all the sonar information on the display when a range change occurs. Without Total Screen Update®, only the most recent sonar information would be drawn to the

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747c, 777c2 specifications

The Humminbird 777c2 and 747c are exemplary fish finders that have made a significant impact on the fishing community, offering a host of features and technologies aimed at enhancing the angling experience. These devices are particularly revered for their user-friendly interfaces and advanced sonar capabilities, catering to both novice and seasoned fishermen alike.

One of the main features of the Humminbird 777c2 is its high-resolution color display. The 7-inch screen provides vibrant visuals, allowing users to easily interpret sonar readings and underwater structures. The screen's clarity ensures that users can spot fish and understand their surroundings in a variety of lighting conditions.

The DualBeam PLUS sonar technology in both models allows for versatility in fishing. This technology combines a wide cone beam for locating fish in a broader area with a narrow beam that provides detailed imaging of the bottom. This dual capability allows anglers to adapt their strategies depending on the fishing situation, whether they are exploring shallow waters or searching deeper depths.

Another notable characteristic is the built-in GPS functionality. The Humminbird 777c2 and 747c come equipped with advanced mapping capabilities, including the ability to create and save waypoints. This feature is a game-changer for fishermen, as it enables them to mark productive fishing spots and navigate efficiently back to them. The integration of navionics charts enhances navigation, providing detailed maps of lakes and coastal waters.

Furthermore, both models boast a user-friendly menu system, making it easy to adjust settings and access various functions. The interface is designed to minimize distractions, allowing users to focus on fishing. Customizable display options enable anglers to tailor the information they see, ensuring that vital sonar data is always at their fingertips.

The durability of the Humminbird 777c2 and 747c is another critical aspect, as these devices are built to withstand harsh marine environments. With weatherproof casings and reliable power sources, anglers can trust that their fish finder will perform consistently, even in challenging conditions.

In conclusion, the Humminbird 777c2 and 747c represent some of the best technology available in modern fish finders. With features such as a high-resolution color display, advanced sonar capabilities, built-in GPS, and a rugged design, these devices significantly enhance the fishing experience, making them a worthwhile investment for anyone serious about the sport.
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