Garmin GPSMAP 440sx Manual

The Garmin GPSMAP 440sx is a high-resolution 4-inch color chartplotter designed for marine navigation. It features a sunlight-readable display, built-in worldwide basemap, support for BlueChart g2 and g2 Vision cards, NMEA 0183 and NMEA 2000 connectivity, internal GPS receiver, fishfinder capability (when connected to a compatible transducer), and rugged, waterproof construction (IPX7). Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 4-inch color TFT display, Power/data cable, Mounting hardware, Protective cover, Internal GPS antenna, SD card slot.

Installation

Unpack and inspect contents. Choose a suitable mounting location with clear view of sky for GPS reception.

1. Mounting: Use included bracket to mount on flat surface. Ensure it is within reach and does not obstruct view.
2. Power Connection: Connect red wire to positive (+) and black wire to negative (-) on boat's 10–32 V DC system. Use in-line fuse as recommended.
3. Data Connections: Connect NMEA 0183 wires to compatible devices (autopilot, sounder) per wiring diagram.
4. Transducer (for fishfinder): Connect compatible transducer to appropriate port on power/data cable.
5. SD Card: Insert BlueChart or data card into slot.

WARNING! Ensure all connections are secure and waterproofed. Disconnect power before making connections.

First-Time Setup

Power on unit; follow on-screen prompts.

1. Language/Units: Select language (default ENGLISH) and preferred units (nautical, statute, metric).
2. GPS Acquisition: Place unit in open sky view. It will automatically acquire satellite signals.
3. Calibration: Calibrate compass (if applicable) and water speed/temperature sensors.
4. Chart Setup: Load detailed charts via SD card. Select chart orientation (North Up, Course Up).
5. System Settings: Configure alarms, display backlight, and data fields.

CAUTION! Do not power on until all connections are complete and dry.

Specifications

• Display Size: 4 inches diagonal, color TFT.
• Resolution: 480 x 640 pixels.
• GPS: High-sensitivity receiver, WAAS/EGNOS capable.
• Waypoints/Routes: 3000 waypoints, 50 routes.
• Tracks: 10,000 points, 20 saved tracks.
• Chart Support: Built-in basemap, BlueChart g2, BlueChart g2 Vision.
• Sonar: Supports traditional and ClearVü scanning sonar (frequencies vary by transducer).
• Power: 10–32 V DC, 1.5 A max.
• Waterproof: IPX7 standard.
• Operating Temp: -15°C to 55°C (5°F to 131°F).

Controls and Settings

Access menus via front-panel buttons: POWER, PAGE, MENU, ZOOM IN/OUT, ROCKER (cursor control).

Main Pages: Navigation Map, Sonar, Compass, Highway, Active Route, Trip Computer.

Map Settings: Chart detail, orientation, depth shading, spot soundings. Navigation Settings: Route planning, waypoint creation, proximity alarms. Sonar Settings: Frequency, sensitivity, range, noise rejection. System Settings: Units, time, backlight, alarms, system information.

Connecting Devices

NMEA 0183: Connect to autopilot, VHF radio, instruments. NMEA 2000: Connect to compatible network via adapter. Sonar: Connect compatible transducer.

1. Turn off power to all devices before connecting.
2. Refer to wiring diagrams for NMEA 0183 connections (Tx/Rx, ground).
3. For NMEA 2000, ensure proper termination and power on backbone.
4. Select data sources in menu > Settings > Communications.

Tip: Use marine-grade, tinned wire and heat-shrink tubing for all connections.

Navigation & Chartplotting

Supports detailed chart navigation, route planning, and waypoint management.

1. View Map: Press PAGE to select Navigation Map. Use ZOOM to adjust scale.
2. Create Waypoint: Move cursor to location, press MENU > Mark Waypoint.
3. Create Route: MENU > Route > New Route. Add waypoints along desired path.
4. Follow Route: Select route from list, press MENU > Navigate.
5. Go To: Select waypoint, press MENU > Go To.
6. Data Fields: Customize map screen to show speed, course, distance, etc.
7. Tracks: Automatically records track; can save and navigate back.

WARNING! Always use updated charts and verify navigation information. This device is an aid only.

Fishfinder Operation

When connected to a compatible transducer.

1. Press PAGE to select Sonar page.
2. Adjust settings: MENU > Sonar Setup for frequency, range, sensitivity.
3. For ClearVü: Ensure compatible scanning transducer is connected and selected in source.
4. Interpret display: Bottom contour, fish arches, structure, thermoclines.
5. Use A-Scope or Split Zoom for detailed view.

Note: Performance depends on transducer type, installation, and water conditions.

Care & Cleaning

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

CAUTION! Ensure connectors are dry before reconnecting power. Store in cool, dry place 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. Contains FCC ID: IPH-00209A. IC: 1792A-00209A. 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

Reset: Hold POWER button for 10 seconds to force restart. For factory reset: System > Reset > Master Reset (erases all user data).

Service: Contact Garmin Product Support or visit www.garmin.com/support.