Garmin GPS 76 User Manual

The Garmin GPS 76 is a rugged, waterproof handheld GPS receiver designed for marine and outdoor navigation. It features a high-sensitivity GPS receiver, built-in worldwide basemap, 24 MB of internal memory for optional map detail, WAAS-enabled accuracy, TracBack® feature to retrace your path, and a large, easy-to-read display. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-sensitivity GPS antenna, waterproof case (IPX7), backlit display, internal memory, and serial/power interface.

Feature	Description
GPS Receiver	High-sensitivity, 12 parallel channel, WAAS-enabled
Waterproof Rating	IPX7 standard (submersible to 1 meter for 30 minutes)
Display	Large, 4-level grayscale LCD with backlight
Memory	24 MB internal for optional MapSource detail
Basemap	Built-in worldwide with cities, highways, and waterways
Interface	RS-232 serial for PC/data cable connection
Power	2 AA batteries (alkaline or NiMH) or external DC input
TracBack®	Retraces your path to starting point
Waypoints/Routes	1000 waypoints, 50 reversible routes
Marine Features	Man Overboard (MOB), tide data (with optional cards)

Installation

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

1. Install batteries: Open battery compartment, insert 2 AA batteries observing polarity.
2. Initial satellite acquisition: Power on unit outdoors with clear view of sky; allow up to 15 minutes for first fix.
3. Mounting options: Use optional mounting bracket for marine or vehicle installation.
4. Connect to PC: Use optional data cable to RS-232 serial port for data transfer.

WARNING! Do not install batteries if compartment is wet. Ensure proper polarity to avoid damage.

First-Time Setup

Power on GPS; follow on-screen prompts.

1. Select language: Use MENU > Setup > System to choose language (default ENGLISH).
2. Set units: Configure distance, speed, elevation, depth, and coordinate format.
3. Calibrate compass (if applicable): Follow on-screen instructions for electronic compass models.
4. Set time: Choose local time or UTC; enable daylight saving if needed.
5. Initialize GPS: Acquire satellite signal; ensure 3D fix for accurate navigation.

CAUTION! Perform initial satellite acquisition outdoors with clear sky view.

Specifications

• GPS Receiver: 12 parallel channels, WAAS/EGNOS enabled.
• Accuracy: <10 meters RMS, <3 meters RMS with WAAS.
• Update Rate: 1 second continuous.
• Waterproof: IPX7 (1 meter, 30 minutes).
• Display: 2.6" W x 1.5" H (4-level grayscale, 160 x 120 pixels).
• Memory: 24 MB internal, stores uploaded map data.
• Waypoints/Routes: 1000 waypoints, 50 reversible routes.
• Track Log: 10,000 points, 20 saved tracks.
• Power: 2 AA batteries (approx. 16 hours typical use).
• Interface: RS-232 serial (NMEA 0183, Garmin protocol).
• Operating Temp: -15°C to 70°C (5°F to 158°F).

Controls and Settings

Access functions via front panel buttons and MENU system.

Front Panel: POWER, PAGE, ENTER/MARK, QUIT, ROCKER (up/down/left/right).

Page Sequence: Use PAGE to cycle through Satellite, Map, Navigation, Highway, Main Menu.

Setup Menu: System (language, units, time), Tracks, Routes, Alarms, Interface, Display (contrast, backlight).

Navigation Settings: Select Go To, Find, Routes, TracBack®, MOB.

Connecting Devices

Data Cable: Connect to PC serial port for data transfer and map uploads. Power Cable: Optional external DC input for extended use.

1. Turn off GPS before connecting cables.
2. Connect data cable to RS-232 port on back of unit.
3. Use MapSource software on PC to transfer waypoints, routes, and map data.
4. For external power, use optional cable to 10-32V DC source.

Tip: Ensure proper serial port settings (4800 baud, NMEA 0183) for data transfer.

Navigation Features

Basic navigation using Go To, Routes, and TracBack®.

1. Go To: Select waypoint; press ENTER to navigate directly.
2. Routes: Create or follow multi-leg routes; navigate sequentially.
3. TracBack®: Retrace your path along saved track log.
4. Find: Search for waypoints, cities, or points of interest.
5. Man Overboard (MOB): Press and hold ENTER/MARK to mark MOB position and navigate back.
6. Highway Page: Provides steering guidance to destination.
7. Map Page: View your position on map with waypoints and tracks.

WARNING! GPS accuracy can be affected by environmental factors; always use with caution.

Waypoints & Routes

Create and manage waypoints and routes for navigation.

Mark Waypoint: Press ENTER/MARK at current location; edit name/symbol.

Edit Waypoint: MENU > Waypoints > select to edit or delete.

Create Route: MENU > Routes > New; add waypoints in sequence.

Activate Route: Select route and choose Navigate.

Reverse Route: Useful for return trips.

Care & Cleaning

Remove batteries before extended storage. Clean with damp cloth; do not use harsh chemicals.

CAUTION! Do not submerge while charging or connecting cables. Avoid extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. This device complies with part 15 of the FCC Rules. Copyright © Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com or contact Garmin Product Support.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Batteries/connections	Install fresh batteries; check polarity; clean contacts.
Poor satellite reception	Obstructions/location	Move to open area; ensure clear view of sky; wait for acquisition.
Inaccurate position	WAAS/old almanac	Enable WAAS; allow time for satellite lock; update almanac.
Display hard to read	Contrast/backlight	Adjust contrast in Setup; enable backlight for low light.
Data transfer fails	Cable/port settings	Check cable connections; verify serial port settings in Interface menu.

Reset: Press and hold PAGE + POWER while powering on for system reset.

Service: Contact Garmin Product Support; www.garmin.com