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

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Grayscale, Inverse: Inverse Grayscale is a Humminbird® feature that reverses the correlation of sonar signal strength and the shade of gray typically used to represent it. The strongest sonar signals are represented by "white", and progressively weaker signals are represented in progressively darker shades of gray. While somewhat counter-intuitive, this method makes the sonar images crisper, and has the benefit of enhancing the apparent sensitivity because the weaker signals appear bolder. Inverse grayscale works well in very clear water. Debris-laden water often appears as a lot of clutter on the screen.

Instant Image Update: Instant Image Update is a Humminbird® feature that updates all the sonar information on the display when Sensitivity and a variety of sonar settings (Bottom View, Range, etc.) are modified. This differs from the traditional functionality that only updates the new sonar information collected after the setting change. Instant Image Update permits more accurate fine-tuning of the display because the user can see the results on the complete sonar graph. When combined with the Freeze Frame feature, the user can adjust and understand the effects of many different sonar settings quickly and easily.

Maximum Depth Menu: The Maximum Depth Menu is a Humminbird® feature that optimizes performance based on the maximum operational depth set by the user. Many Humminbird® units can operate across a very broad depth range (up to 2500 feet) which causes the unit to "look" up to that full depth under some circumstances. Due to the speed of sound in water, this can result in less responsiveness because the unit has to wait for a longer period of time to receive the sonar signal. When the Maximum Depth menu is set to a lower value, the unit only looks up to the setting, which increases the responsiveness of the unit. This is an important feature for anyone operating in shallower depths!

Noise: Noise is unintentional, external sound waves that interfere with the optimal operation of sonar. Noise appears as random "dots" on the display, and is caused by a variety of sources. Electrical noise (from trolling motors, bilge pumps, VHF radios) typically manifests as a consistent dot pattern. Electrical noise can be isolated by selectively turning on and off other electrical devices to determine the source. Often re-routing the power cable, or connecting to an alternative power supply (second battery) can help overcome electrical noise. Hydrodynamic noise (from propeller and/or hull cavitation) has a more random appearance and is generally related to boat speed, so that faster operation results in more noise.

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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 ViewPOWER/LIGHT Key Key FunctionsView 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 StatusAccessory Test PC ConnectWith PC Connect Cable only Sonar X-Press Menu WideSide transducer WideSide view only SideSensitivity Upper Range Lower Range Side Beam Range Quad Layout Chart SpeedZoom Level Bottom LockSonar 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 AlarmLow Battery Alarm Aux. Temp. AlarmWith optional-purchase temp. probe or Temp/Speed only Alarm Tone Temp AlarmSetup Menu Tab International only Units DepthUnits Temp Units DistanceUser Mode Units SpeedLanguage Restore Defaults Triplog ResetAdvanced, Sonar view only Select ReadoutsDefault Sonar View Customized Sonar View Aux. Temp. Offset Depth OffsetTemp Offset Speed CalibrationAdvanced, 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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