Garmin GPSMAP 765 Manual

The Garmin GPSMAP 765 is a high-performance marine chartplotter featuring a 7-inch sunlight-readable display, preloaded BlueChart g2 coastal charts, built-in GPS/GLONASS receiver, support for radar, sonar, and autopilot integration, NMEA 2000 and NMEA 0183 connectivity, touchscreen and keypad control, and rugged, waterproof design. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

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

Features at a Glance

Key components: 7-inch sunlight-readable display, built-in GPS/GLONASS antenna, Power/data cable, Mounting hardware, Protective cover.

Feature	Description
Display	7-inch diagonal, 800 x 480 pixels, sunlight-readable, resistive touch
Charts	Preloaded BlueChart g2 coastal charts
GPS Receiver	High-sensitivity GPS/GLONASS receiver
Connectivity	NMEA 2000, NMEA 0183, Ethernet, audio/video input
Waterproof Rating	IPX7 (submersible to 1 meter for 30 minutes)
Power Supply	10–32 V DC
Memory	Internal memory for charts and waypoints; microSD card slot
Compatibility	Garmin radar, sonar, autopilot, and VHF radios
Control	Touchscreen and physical keypad
Audio	Built-in speaker for audible alerts

Installation

Unpack and inspect contents. Choose mounting location carefully.

Mount the unit: Use included bracket to mount on flat surface at helm.
Connect power: Route power cable to 10–32 V DC source; connect red to positive, black to negative.
Connect NMEA 2000: Attach to NMEA 2000 network using appropriate cables and connectors.
Connect accessories: Attach radar, sonar, autopilot, or VHF via Ethernet or NMEA ports.
Secure cables: Use cable ties to secure and protect all connections.

WARNING! Ensure power is off during installation. Route cables away from moving parts and heat sources.

First-Time Setup

Apply power; follow on-screen prompts.

Language and units: Select language, set nautical/statute units, time format.
GPS initialization: Allow unit to acquire satellite signals (may take several minutes).
Chart setup: Verify preloaded charts; install additional charts via microSD if needed.
Network configuration: Set up NMEA 2000 network and connected devices.
Calibrate sensors: Follow prompts to calibrate compass and water temperature if connected.

CAUTION! Perform initial setup in open area with clear view of sky for best GPS reception.

Specifications

Display Size: 7 inches diagonal.
Display Resolution: 800 x 480 pixels.
Waterproof Rating: IPX7.
Power Input: 10–32 V DC.
GPS Receiver: High-sensitivity GPS/GLONASS.
Charts: Preloaded BlueChart g2.
Memory: Internal memory; microSD card slot.
Communication: NMEA 2000, NMEA 0183, Ethernet.
Dimensions: 7.9" W x 5.0" H x 2.8" D (200 x 127 x 71 mm).
Weight: 2.2 lb (1.0 kg).

Controls and Settings

Access menus via touchscreen or physical keys. Front Panel: POWER, PAGE, ZOOM IN/OUT, ENTER/MARK, QUIT.

Touchscreen: Tap icons and menus for navigation and settings.

Navigation: Set waypoints, routes, tracks; adjust map orientation (North Up, Course Up). Chart: Adjust detail, depth shading, chart appearance. Sonar: Configure frequency, range, sensitivity for connected transducer. System: Set backlight, sounds, units, language, network, software updates.

Connecting Devices

NMEA 2000: Connect to network for engine data, wind, depth, etc. Radar: Connect via Ethernet cable. Sonar: Connect transducer to appropriate sonar module. Autopilot: Connect via NMEA 2000 or NMEA 0183.

Turn off power to all devices before connecting.
Use appropriate Garmin cables and connectors.
Configure each device in the Network section of the System menu.

Tip: Label cables during installation for easier identification later.

Navigation & Chartplotting

Supports waypoints, routes, tracks, and AIS (if connected).

Create waypoint: Press ENTER/MARK at current location or tap spot on chart.
Create route: Select Route > New Route, tap chart points, save.
Follow route: Select route, choose Navigate To.
View track: Enable track recording to see path traveled.
Use AIS: If AIS receiver connected, view targets on chart with details.
Alarms: Set anchor drag, arrival, off-course, and other alarms.
Man Overboard (MOB): Press and hold ENTER/MARK to mark MOB location and navigate back.

WARNING! Always verify chart data and use prudent seamanship. This device is an aid to navigation only.

Sonar & Radar Features

Sonar: View depth, fish arches, bottom structure. Adjust frequency (50/200 kHz), range, and sensitivity. Radar: Overlay radar image on chart for situational awareness. Adjust range, gain, clutter.

Care & Maintenance

Disconnect power before cleaning. Use fresh water and mild soap with soft cloth. Do not use harsh chemicals or abrasives.

CAUTION! Ensure seals are intact for waterproofing. Store in protective cover when not in use.

Regulatory Information

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

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power connection	Check fuse, verify 10–32 V DC at power cable, ensure connections are secure.
Poor GPS reception	Obstruction	Move to open area; check for metal obstructions above unit.
Display is dim	Backlight setting	Adjust backlight in System > Display settings.
No data from NMEA devices	Network configuration	Verify NMEA 2000 power, check device configuration in Network menu.
Chart not displaying	Chart data	Ensure chart region is correct; check microSD card is properly inserted.
Touchscreen not responding	Calibration/screen protector	Recalibrate touchscreen in System settings; remove any non-Garmin screen protector.

Reset: System > Reset > Reset Settings (does not erase user data).

Service: Contact Garmin Product Support or authorized service center.