Humminbird manual 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM

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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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Contents 747c and 777c2 Operations Manual Thank You Table of Contents Setup Menu Tab Views Menu Tab Accessories Menu Tab Troubleshooting How Sonar Works 531526-1A 747c&777c2ManEng.qxp 10/2/2006 140 AM DualBeam Plus Sonar With optional-purchase QuadraBeam Plus Transducer QuadraBeam Plus SonarWith optional-purchase WideSide transducer WideSide SonarUniversal Sonar What’s On the Display About Views Sonar View Understanding Sonar History Freeze Frame and Cursor Real Time Sonar RTS WindowBottom Presentation 531526-1A 747c&777c2ManEng.qxp 10/2/2006 141 AM Sonar Zoom View Sonar Zoom View200/83 kHz Split Sonar View Big Digits View Big Digits ViewCircular Flasher View Side Beam View Side Beam View, Default LayoutSide Beam View, Classic Layout Side Beam View, Slanted Layout WideSide View WideSide ViewKey Functions POWER/LIGHT KeyView Key WAY Cursor Control Key Menu KeyExit Key Accessory Bus 777c2 Powering Up the UnitReactivate the X-Press Menu Menu SystemSonar Tab Normal Mode Advanced Mode Normal Operation Start-Up Options MenuSimulator Self Test System StatusPC Connect Accessory TestWith PC Connect Cable only Sonar X-Press Menu WideSide transducer WideSide view only SideSensitivity Upper Range Lower Range Side Beam Range Quad Layout Chart SpeedBottom Lock Zoom LevelSonar Zoom View only Bottom Range Sonar Zoom View only, when Bottom Lock is OnSonar Menu Tab Beam Select Fish ID+ Fish ID Sensitivity Zoom Width Bottom ViewAdvanced KHz SensitivityAdvanced with QuadraBeam Plus transducer To change the 455 kHz Sensitivity settingAdvanced with WideSide transducer WideSide SensitivityDepth Lines Surface Clutter Max Depth Noise FilterTransducer Select Water TypeAlarms Menu Tab Fish ID Alarm Depth AlarmAux. Temp. Alarm Low Battery AlarmWith optional-purchase temp. probe or Temp/Speed only Alarm Tone Temp AlarmSetup Menu Tab International only Units DepthUnits Temp Units DistanceUnits Speed User ModeLanguage Restore Defaults Triplog ResetAdvanced, Sonar view only Select ReadoutsDefault Sonar View Customized Sonar View Aux. Temp. Offset Depth OffsetSpeed Calibration Temp OffsetAdvanced, with Temp/Speed only Digits Format Nmea Output Transducer Views Menu TabAccessories Menu Tab Series Doesn’t Power Up TroubleshootingProblem Possible Cause Display ProblemsIsolation Finding the Cause of NoiseSeries Fishing System Accessories 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM Additional details Specifications 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM Sonar Terms Glossary531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM Receiver See Transmitter 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM 531526-1A 747c&777c2ManEng.qxp 10/2/2006 142 AM Contact Humminbird

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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