Garmin GPSMAP 76 Manual

The Garmin GPSMAP 76 is a rugged, waterproof marine GPS handheld with a high-sensitivity receiver, detailed basemap, 24 MB internal memory for map storage, and a large, sunlight-readable display. It features WAAS-enabled GPS and DGPS beacon receiver for enhanced accuracy, dedicated marine navigation functions, tide tables, and a built-in celestial database for sun and moon information. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation & Power 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Basic Navigation 8. Marine Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-sensitivity GPS receiver, 24 MB internal memory, sunlight-readable display, waterproof case (IPX7), dedicated marine keys, and serial/power interface.

Feature	Description
GPS Receiver	WAAS-enabled, 12 parallel channels
Display	160 x 240 pixels, sunlight-readable, 4-level grayscale
Memory	24 MB internal for map storage
Waterproof Rating	IPX7 (submersible 1 meter for 30 minutes)
Battery	2 AA batteries (alkaline or NiMH)
Interface	RS-232 serial for PC/data transfer
Marine Features	Tide tables, celestial data, MOB (Man Overboard)
Navigation	Waypoints, routes, tracks, automatic routing
Basemap	Built-in worldwide basemap
Backlight	Adjustable for night use

Installation & Power

Unpack and inspect contents. Install batteries and power on.

Install batteries: Open battery compartment, insert 2 AA batteries observing polarity.
External power: Connect optional external power cable to serial/power interface.
Mounting: Use optional mounting bracket for marine or vehicle installation.
Initial satellite acquisition: Power on outdoors with clear sky view.

WARNING! Use only recommended batteries. Ensure battery compartment seal is intact for waterproofing.

First-Time Setup

Power on unit; follow on-screen prompts.

Initial satellite acquisition: Allow several minutes for first fix; remain stationary outdoors.
Set language: In SETUP menu, select language (default ENGLISH).
Set units: Choose nautical, statute, or metric units.
Set time: Configure time zone and format (12/24 hour).
Calibrate compass (if equipped): Follow on-screen instructions.

CAUTION! For best performance, acquire satellite signal outdoors away from obstructions.

Specifications

GPS Receiver: 12 parallel channel, WAAS-enabled.
Accuracy: <10 meters typical, <5 meters with WAAS.
Display: 160 x 240 pixels, 2.6" x 1.5", sunlight-readable.
Waterproof: IPX7 standard.
Battery Life: Up to 16 hours (typical use).
Memory: 24 MB internal, stores up to 500 waypoints, 50 routes.
Interface: RS-232 serial (NMEA 0183 compatible).
Operating Temp: -15°C to 70°C (5°F to 158°F).
Dimensions: 6.9" x 2.7" x 1.4" (17.5 x 6.9 x 3.6 cm).
Weight: 7.5 oz (213 g) with batteries.

Controls and Settings

Access menus via PAGE and MENU buttons. Front Panel: POWER, PAGE, ENTER/MARK, ROCKER keypad, QUIT.

Dedicated Keys: MOB (Man Overboard), IN/OUT (zoom), FIND (waypoints), MENU.

Setup Menu: System (interface, display, units), Time, Alarms, Navigation (routing preferences). Map Setup: Orientation (North Up, Track Up), Detail level, Data Fields. Tracks: Record track log, set recording interval. Routes: Create and navigate routes. Waypoints: Mark and manage locations.

Connecting Devices

Serial Interface: Connect to PC for data transfer or external power. NMEA 0183: Connect to marine instruments.

Turn off GPS before connecting cables.
Use Garmin data cable (part number 010-10141-00).
Connect to PC serial port for uploading maps/waypoints.
For NMEA output, configure interface settings in Setup menu.

Tip: Ensure proper cable orientation; secure connections for marine use.

Basic Navigation

Supports waypoint, route, and track navigation.

Mark waypoint: Press and hold ENTER/MARK at location.
Go To: Press FIND, select waypoint, choose "Go To".
Follow route: Create route in Route menu, then activate navigation.
Track navigation: Enable track log to record path; navigate back using Track Back.
MOB function: Press MOB button to mark man overboard position and navigate back.
Map navigation: Use IN/OUT to zoom; rocker key to pan map.
Data screens: Cycle through pages (Satellite, Map, Navigation, Highway) with PAGE button.

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

Marine Features

Tide Tables: View tide predictions for selected locations. Celestial Information: Sun and moon rise/set times, moon phase. Marine Points of Interest: Built-in marine services database. NMEA 0183 Output: Interface with autopilots, chartplotters.

Care & Maintenance

Rinse with fresh water after saltwater use. Clean with mild soap and damp cloth. Ensure battery compartment seal is clean and intact.

CAUTION! Do not use harsh chemicals or high-pressure water spray. Store in cool, dry place.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. 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	Replace batteries; check polarity; clean contacts.
Poor satellite reception	Location	Move to open area; ensure clear view of sky.
Inaccurate position	WAAS/calibration	Enable WAAS; allow time for DGPS correction.
Display difficult to read	Contrast/backlight	Adjust contrast in Setup; enable backlight.
PC connection failed	Cable/settings	Check cable; ensure proper COM port selection; verify interface settings.
Waypoints not saving	Memory full	Delete unused waypoints; reset if necessary.

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

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