Humminbird NS-851 Helix 7 CHIRP GPS G4

Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of your Humminbird NS-851 Helix 7 CHIRP GPS G4 unit. This device combines advanced CHIRP sonar technology with precise GPS navigation, designed to enhance your fishing and boating experience. Please read this manual thoroughly before using the product to ensure proper function and safety.

Setup

Proper setup is crucial for optimal performance of your Helix 7 CHIRP GPS G4 unit. Follow these steps carefully.

1. Mounting the Control Head

Select a mounting location that provides clear visibility, easy access to controls, and protection from excessive spray or direct sunlight. Use the included gimbal bracket and hardware to securely mount the unit. Ensure there is sufficient space behind the unit for cable connections and ventilation.

Figure 1: The Humminbird Helix 7 CHIRP GPS G4 unit. This image displays the device from an angled perspective, showcasing its 7-inch screen with active sonar and GPS map displays. The control buttons are visible on the right side of the unit, and it is mounted on its standard gimbal bracket.

2. Power Connection

• Connect the red wire from the power cable to the positive (+) terminal of a 12V DC power source.
• Connect the black wire from the power cable to the negative (-) terminal of the power source.
• Ensure all connections are secure and protected from water ingress. It is recommended to install an in-line fuse (not included) for protection.

3. Transducer Installation

The transducer is essential for sonar operation. Refer to the separate transducer installation guide for detailed instructions specific to your transducer model and boat type (e.g., transom mount, in-hull, thru-hull). Ensure the transducer is mounted in a location free from turbulence for accurate readings.

Operating Instructions

This section covers the basic operation of your Humminbird Helix 7 unit.

1. Powering On/Off

• To Power On: Press and hold the POWER button (located on the bottom right of the control panel) until the Humminbird logo appears.
• To Power Off: Press and hold the POWER button until the power-off options appear, then select "Power Off" or continue holding until the unit shuts down.

Figure 2: Close-up view of the control panel on the Humminbird Helix 7. This image highlights the various buttons including MENU, EXIT, MARK, GOTO, and the directional keypad, which are used for navigating the unit's features and settings.

2. Basic Navigation and Menus

• Use the MENU button to access the main menu and adjust settings for the current view. Press MENU twice to access the main system menu.
• Use the directional keypad (up, down, left, right) to navigate through menu options and adjust values.
• Press the CHECK/SELECT button (center of the keypad) to confirm selections.
• Press the EXIT button to close menus or return to the previous screen.

3. Sonar Operation (CHIRP)

The CHIRP sonar provides detailed target separation and clear images of fish and structure. The unit automatically adjusts most sonar settings for optimal performance. You can fine-tune settings like Sensitivity, Depth Range, and Frequency through the Sonar menu.

• Sensitivity: Adjusts the unit's ability to detect weak returns. Increase for clearer images in deep water or soft bottoms; decrease to reduce clutter in shallow water.
• Depth Range: Set to Auto for automatic adjustment or Manual to fix the depth range.
• Frequency: The Helix 7 G4 supports multiple CHIRP frequencies. Select the appropriate frequency for your fishing conditions (e.g., lower frequencies for deeper penetration, higher frequencies for more detail).

4. GPS Functions

The integrated GPS allows for precise navigation, marking waypoints, and creating routes.

• Mark Waypoint: Press the MARK button to save your current location as a waypoint. You can then edit the waypoint name and symbol.
• Go To: Use the GOTO button to navigate to a saved waypoint or a specific coordinate.
• Routes: Create and manage routes by connecting multiple waypoints. Access this feature through the Navigation menu.

Maintenance

Regular maintenance ensures the longevity and optimal performance of your Humminbird unit.

1. Cleaning the Unit

• Wipe the screen and unit housing with a soft, damp cloth.
• Do not use abrasive cleaners, solvents, or chemical-based cleaning products, as these can damage the screen and plastic components.
• For stubborn stains, use a mild soap solution.

2. Transducer Care

Periodically inspect the transducer for marine growth or damage. Clean the transducer face with a soft cloth and mild soap to ensure clear sonar signals. Avoid scratching the transducer surface.

3. Software Updates

Humminbird occasionally releases software updates to improve performance and add new features. Visit the official Humminbird website to check for the latest software versions and follow the provided instructions for updating your unit.

4. Storage

When storing the unit for extended periods, especially in cold weather, disconnect it from power and store it in a dry, temperature-controlled environment. Consider using a protective cover.

Troubleshooting

This section provides solutions to common issues you might encounter.

Specifications

Key technical specifications for the Humminbird NS-851 Helix 7 CHIRP GPS G4.

• Model Name: NS-851
• Model Number: 597005F
• Brand: Humminbird
• Screen Size: 7 Inches
• Connectivity Technology: GPS
• Main Material: Plastic
• Color: Multicolor
• Power Source: Requires 12V DC (Batteries not included)
• UPC: 082324056697
• Package Dimensions: 43.8 x 35.7 x 11.9 cm; 2.16 kilograms