Garmin GPS 76 Marine Navigator Manual

The Garmin GPS 76 is a rugged, waterproof marine GPS navigator featuring a high-contrast 4-level grayscale display, built-in worldwide basemap, 1MB internal memory for storing optional MapSource detail, 500 user waypoints with graphic icons, 50 reversible routes, and a track log of 10,000 points. It supports NMEA 0183 interface, has a built-in quad helix antenna for superior reception, and is powered by 2 AA batteries. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-contrast LCD display, Rocker Keypad, PAGE and ENTER buttons, Power/Backlight key, Waterproof case (IPX7), Data/power connector, External antenna port.

Installation & Power

Unpack and inspect contents. Install batteries and acquire satellite signal.

1. Install Batteries: Remove battery cover, insert 2 AA batteries observing polarity.
2. Initial Power On: Press and hold POWER key. Unit will begin satellite acquisition.
3. External Power (Optional): Connect to 10-40 VDC using Garmin power/data cable.
4. Mounting: Use optional mounting bracket for secure placement on boat.

WARNING! Use only recommended batteries. Ensure battery cover is securely sealed for waterproof integrity.

First-Time Setup

Power on unit; follow on-screen prompts for initial configuration.

1. Acquire Satellites: Hold unit outdoors with clear view of sky. Acquisition may take several minutes.
2. Set Preferences: Press MENU > Setup. Set units (nautical/statute), north reference, time format.
3. Initialize Position: If prompted, use rocker to highlight your approximate location on the map.
4. Calibrate Compass (if equipped): Follow on-screen instructions for electronic compass calibration.

CAUTION! For accurate positioning, ensure clear view of sky during initial satellite acquisition.

Specifications

• Display: 160 x 120 pixels, 4-level grayscale, backlit.
• GPS Receiver: 12 parallel channel, WAAS enabled.
• Accuracy: <15 meters RMS, <3 meters RMS with WAAS.
• Memory: 1 MB internal, 500 waypoints, 50 routes, 10,000 track points.
• Interface: NMEA 0183 v2.3, RTCM 104 DGPS corrections, RS-232 serial.
• Power: 2 AA batteries (alkaline or NiMH), 10-40 VDC external.
• Waterproof: IEC 60529 IPX7 standard.
• Dimensions: 6.3" H x 2.7" W x 1.4" D (15.9 x 6.8 x 3.5 cm).
• Weight: 7.5 oz (213 g) with batteries.
• Operating Temp: 5°F to 158°F (-15°C to 70°C).

Controls and Display

Access functions via PAGE, MENU, ENTER keys and Rocker pad. Front Panel: POWER/BACKLIGHT, PAGE, MENU, ENTER, ROCKER.

Display Pages: Satellite Status, Map, Navigation, Highway, Main Menu.

Setup Menu: Units, Time, Display, Interface, System, Tracks, Alarms. Navigation: Create and navigate to waypoints, follow routes, view track log. Map: Pan and zoom built-in basemap or optional MapSource detail.

Connecting to External Devices

Data/Power Cable: For connection to PC or NMEA 0183 compatible devices.

1. Turn off GPS unit before connecting cables.
2. Connect Garmin data cable to unit's data/power port.
3. To PC: Connect serial end to PC COM port for data transfer with MapSource.
4. To NMEA Device: Wire cable per NMEA 0183 wiring diagram to plotter, sounder, or autopilot.

Tip: Ensure proper wiring polarity when connecting to NMEA network to avoid damage.

Basic Navigation Operations

Creating and navigating to waypoints, following routes.

1. Mark Waypoint: Press and hold ENTER at current location. Edit name/symbol if desired.
2. Go To Waypoint: Press MENU > Waypoints. Select waypoint, choose "Go To".
3. Create Route: Press MENU > Routes > New. Add stored waypoints in sequence.
4. Follow Route: From Routes list, highlight route and select "Navigate".
5. Track Back: Press MENU > Tracks > Track Back to reverse your path.
6. Measure Distance: On Map page, press MENU > Measure Distance. Move cursor to point.

WARNING! GPS is an aid to navigation. Always use in conjunction with official charts and prudent seamanship.

Advanced Features

NMEA Output: Configure data sentences in Interface setup. MOB (Man Overboard): Press and hold PAGE key to instantly mark MOB location and begin navigation back. Proximity Waypoints: Set alarm radius around any waypoint. Sun/Moon Information: View sunrise/sunset and moon phase data for planning.

Care & Maintenance

Rinse with fresh water after saltwater use. Clean case with mild soap and damp cloth. Do not use harsh chemicals or abrasives.

CAUTION! Ensure battery cover O-ring is clean and seated properly to maintain waterproof seal. Do not open case; user-serviceable parts are limited to batteries only.

Regulatory Information

FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to condition that device does not cause harmful interference. Copyright © Garmin Ltd. or its subsidiaries. Garmin and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com/support or contact Garmin Product Support.

Troubleshooting

Reset: Press and hold PAGE + POWER while powering on to perform master reset (erases all user data).

Service: Contact Garmin Product Support or visit www.garmin.com.