Garmin GPSMAP 721 Manual

The Garmin GPSMAP 721 is a 7-inch chartplotter designed for marine navigation, featuring a high-resolution sunlight-readable display, built-in worldwide basemap, support for BlueChart g3 coastal charts, sonar compatibility, NMEA 2000 and NMEA 0183 connectivity, Wi-Fi for updates and ActiveCaptain, touchscreen interface, and rugged waterproof construction (IPX7). Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 7-inch LCD touchscreen, Power/data cable, Mounting hardware, Protective cover, NMEA 2000 connector, SD card slot, Waterproof housing.

Installation

Unpack and inspect contents. Choose mounting location with clear view and access.

1. Mount bracket: Use provided hardware to secure bracket to dash or console.
2. Connect power/data cable: Route cable to power source (10–32 V DC) and ground.
3. Connect NMEA 2000 network: Attach to backbone for engine/data sharing.
4. Connect sonar transducer: Use appropriate cable to transducer input.
5. Secure unit: Snap chartplotter into bracket; tighten security screw.

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

First-Time Setup

Power on unit; follow on-screen prompts.

1. Select language: Choose from available options (default English).
2. Configure settings: Set units (nautical/statute), time zone, date format.
3. Agree to terms: Accept GPS and data agreements.
4. Connect to Wi-Fi: Go to Settings > Wi-Fi to connect for updates.
5. Install charts: Insert SD card with BlueChart or use ActiveCaptain to download.
6. Calibrate sensors: Follow prompts for compass and water speed if connected.

CAUTION! Ensure secure mounting before operation on moving vessel.

Specifications

• Display Size: 7 inches diagonal.
• Resolution: 800 x 480 pixels (WQVGA).
• Waterproof Rating: IPX7.
• Power Supply: 10–32 V DC, 2 A max.
• GPS Receiver: Internal GPS/GLONASS.
• Memory: Internal storage for waypoints/routes; SD card slot.
• Wireless: Wi-Fi (802.11 b/g/n).
• NMEA Interfaces: NMEA 2000, NMEA 0183.
• Sonar Support: CHIRP traditional, ClearVü, SideVü (with compatible transducer).
• Operating Temp: -15° to 55°C (5° to 131°F).

Controls and Settings

Access menus via touchscreen. Physical buttons: Power, Volume.

Touchscreen: Tap icons, swipe screens, pinch-to-zoom on charts.

Main Menu: Navigation, Sonar, Settings, ActiveCaptain, Alarms. Settings: System (language, units, time), Display (brightness, color mode), Communications (Wi-Fi, NMEA), Alarms (anchor drag, arrival, etc.). Navigation: Create waypoints, plan routes, track recording. Sonar: Adjust frequency, range, gain, noise filters.

Connecting Devices

NMEA 2000: Connect to backbone for engine data, instruments. NMEA 0183: For legacy devices. Sonar: Transducer cable to appropriate port. Wi-Fi: For updates and ActiveCaptain.

1. Turn off power before connecting devices.
2. Use appropriate Garmin cables and connectors.
3. Configure NMEA sentences in Settings > Communications.
4. For sonar, ensure transducer is properly installed and selected in sonar settings.

Tip: Label cables during installation for easier troubleshooting.

Navigation & Chartplotting

Supports detailed marine charts and navigation tools.

1. View chart: From Home, tap Navigation. Use pinch-to-zoom.
2. Create waypoint: Tap and hold on chart, select "Save as Waypoint."
3. Plan route: Tap Route, tap points on chart, tap Done.
4. Follow route: Select route from list, tap Go.
5. Track recording: Settings > Tracks > Record Track.
6. Use ActiveCaptain: Sync with app for updates, community data.
7. Dock-to-dock Autorouting: Enter destination for automatic route (with compatible charts).
8. View tide/current data: Available on compatible BlueChart g3.

WARNING! Always have paper charts as backup. GPS signals can be obstructed.

Sonar Features

With compatible transducer, view traditional CHIRP, ClearVü (down scan), SideVü (side scan).

1. Access sonar: From Home, tap Sonar.
2. Select view: Traditional, ClearVü, or SideVü.
3. Adjust settings: Frequency, range, gain, scroll speed.
4. Use A-scope: Real-time vertical display for precise depth.
5. Save screenshots: Tap and hold screen to save image to SD card.

Note: Sonar performance depends on transducer type and installation.

Care & Cleaning

Turn off and disconnect power before cleaning. Use soft, damp cloth with fresh water; mild soap if needed. Do not use abrasive cleaners or solvents.

CAUTION! Do not spray water directly into ports. Ensure unit is dry before re-powering.

Regulatory Information

FCC Compliance: This device complies with part 15 of the FCC Rules. Operation is subject to conditions: (1) device may not cause harmful interference, (2) device must accept any interference received. Contains FCC ID: IPH-03409A. IC: 1792A-03409A. For EU, complies with RED 2014/53/EU. Copyright © Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com/support or contact your local dealer.

Troubleshooting

Reset: Settings > System > Reset to factory defaults (backup data first).

Service: Contact Garmin Product Support or authorized dealer.