Garmin GPSMAP 750s User Manual

The Garmin GPSMAP 750s is a high-performance marine chartplotter featuring a 7-inch sunlight-readable display, built-in worldwide basemap, support for BlueChart g3 coastal charts and LakeVü g3 inland maps, built-in GPS/GLONASS receiver, sonar compatibility, NMEA 2000 and NMEA 0183 connectivity, touchscreen interface, and rugged, waterproof design (IPX7). Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 7-inch WVGA display, Power/data cable, Mounting hardware, Protective cover, Documentation.

Installation

Unpack and inspect contents. Plan mounting location for clear view and access.

1. Mounting: Use included bracket. Select a flat, sturdy surface on helm. Ensure clear view and touch access.
2. Power Connection: Connect red wire to boat's positive (+) DC power (10–35 Vdc). Connect black wire to negative (-) or ground.
3. Data Connections: Connect NMEA 2000 drop cable to boat's NMEA 2000 network. Connect NMEA 0183 wires if interfacing with legacy devices.
4. Sonar Transducer: Connect compatible Garmin transducer to appropriate sonar port on power/data cable.
5. Secure Cables: Route and secure all cables away from moving parts and heat sources.

WARNING! Disconnect boat's battery before making electrical connections. Ensure mounting surface can support unit weight. Do not mount where it obstructs operator's view.

First-Time Setup

Apply power to the unit; follow on-screen prompts.

1. Language/Units: Select preferred language and navigation units (nautical miles, statute miles, kilometers).
2. Agree to Terms: Read and accept the software license agreement.
3. GPS Acquisition: Place unit in open sky view. It will automatically acquire GPS/GLONASS satellites.
4. Chart Selection: If using additional chart cards, insert microSD card. Select active chart from Settings > My Maps.
5. Calibration (Optional): Calibrate compass and water speed if connected sensors require it.
6. Network Setup: If connected to a Garmin Marine Network, devices should auto-detect. Verify in Settings > Communications.

CAUTION! Perform initial GPS acquisition in an open area away from obstructions for best performance.

Specifications

• Display Size: 7 inches diagonal, WVGA TFT with LED backlight.
• Touchscreen: Capacitive, multi-touch capable.
• GPS: High-sensitivity receiver with WAAS/EGNOS support.
• Chart Compatibility: BlueChart g3, BlueChart g3 Vision, LakeVü g3, LakeVü g3 Ultra.
• Sonar Compatibility: Supports Garmin CHIRP traditional, ClearVü, and SideVü scanning sonar.
• Interfaces: NMEA 2000, NMEA 0183, 10/100 Ethernet, microSD card slot.
• Power Supply: 10–35 Vdc, typical current draw 1.1 A @ 12 Vdc.
• Environmental: IPX7 waterproof, operating temp -15° to 55°C (5° to 131°F).
• Audio: Built-in speaker and 3.5 mm external speaker jack.
• Dimensions (WxHxD): 199 x 117 x 50 mm (7.8 x 4.6 x 2.0 in).

Controls and Settings

Primary control is via the capacitive touchscreen. Physical button: Power/Volume (press to turn on/off, rotate to adjust volume).

Home Screen: Provides quick access to Navigation, Sonar, Media, and Settings.

Settings Menu (Gear Icon): Access system configuration.

• System: Display brightness, language, units, system information, restore defaults.
• Navigation: Route preferences, alarms (anchor drag, arrival, off-course).
• Communications: NMEA 2000/NMEA 0183 settings, network device list.
• My Maps: Select active chart and manage chart cards.
• Sounder: Configure sonar views, frequencies, and settings (if transducer connected).

Quick Access: Swipe from top edge for notifications; swipe from bottom for audio/media controls.

Connecting Devices

The GPSMAP 750s integrates with various marine electronics.

1. NMEA 2000 Network: Connects to engine data, wind, depth, speed, autopilots, etc. Use standard NMEA 2000 drop cable.
2. NMEA 0183 Devices: Connect to legacy instruments or VHF radios for DSC positioning. Wire per diagram in manual.
3. Garmin Marine Network: Connect via Ethernet cable to other Garmin plotters, radars, or sonar modules for shared data.
4. Sonar Transducer: Connect compatible transducer to the labeled port on the power/data cable.
5. microSD Card: Insert card for additional charts, software updates, or saving user data (waypoints, routes).

Tip: Always power down the chartplotter and disconnect power before connecting or disconnecting cables.

Navigation & Chartplotting

Core functions for planning and following routes.

1. Viewing the Chart: Touch and drag to pan; pinch to zoom in/out.
2. Creating a Waypoint: Tap and hold desired location on chart, select "Save as Waypoint."
3. Creating a Route: Tap Menu > Route > New Route. Tap on chart to add points, tap "Calculate" to create route.
4. Following a Route: Select a route from the Route list, tap "Go". Navigation data screens will appear.
5. Man Overboard (MOB): Quickly tap the MOB button (or assigned shortcut). Unit marks position and creates route back.
6. Data Screens: Customize screens to show speed, course, depth, wind, etc. Swipe left/right on chart view.
7. Tracks: Automatically records track log. Can be saved and reversed for navigation.

WARNING! Always verify chart data and use navigation aids for safe boating. This device is an aid to navigation only.

Sonar Features

When a compatible transducer is connected.

1. Accessing Sonar: Tap "Sonar" from the Home screen.
2. Views: Select traditional CHIRP sonar, ClearVü down imaging, or SideVü side imaging.
3. Adjustments: Use on-screen controls or Settings menu to adjust frequency, range, gain, and color scheme.
4. Recording: Tap the record button to log sonar data to the microSD card for later review.
5. Split-Screen: View sonar alongside the chart. Tap "Split" and choose layout.

Note: Sonar performance depends on transducer selection, installation, and water conditions.

Care & Cleaning

Disconnect power before cleaning.

1. Screen/Casing: Wipe with a soft, lint-free cloth dampened with fresh water. A mild, non-abrasive cleaner can be used on the casing only.
2. Do Not: Use harsh chemicals, solvents, or ammonia-based cleaners on the screen. Do not spray liquids directly onto unit.
3. Connectors: Keep power/data connector and ports free of corrosion and debris. Protect from prolonged moisture when disconnected.
4. Storage: If removing for season, store in a cool, dry place. Use protective cover.

CAUTION! Never submerge the unit beyond its rated IPX7 depth (1 meter). Ensure seals on connectors are intact.

Regulatory Information

This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Contains FCC ID: IPH-03321. Contains IC: 1792A-03321.

© 2012-2025 Garmin Ltd. or its subsidiaries. All rights reserved. Garmin, GPSMAP, BlueChart, LakeVü, ClearVü, and SideVü are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries.

NAVIONICS® is a registered trademark of Navionics, Inc.

For the latest software updates, documentation, and support, visit www.garmin.com or contact Garmin Product Support at 1-913-397-8200 (U.S.) or your regional support center.

Troubleshooting

Reset: Hold Power button for 10 seconds to force restart. For factory reset, go to Settings > System > Restore Defaults.

Service: Contact Garmin Product Support. Do not open the unit; void warranty.