Garmin GPSMAP 4208 Installation Manual

The Garmin GPSMAP 4208 is a high-resolution 8.4-inch marine chartplotter designed for professional and recreational marine navigation. It features a sunlight-readable display, preloaded BlueChart g2 coastal charts, built-in worldwide basemap, support for radar, sonar, and autopilot integration, NMEA 0183/2000 connectivity, and waterproof construction (IPX7). Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: 8.4-inch sunlight-readable display, Power/NMEA cable, Mounting hardware, Protective cover, Documentation.

Installation

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

1. Select Mounting Location: Ensure location is flat, sturdy, and within reach of operator.
2. Prepare Mounting Surface: Drill holes as per template for flush or bracket mount.
3. Connect Power/NMEA Cable: Route cable to power source and connect red to positive (+), black to negative (-).
4. Connect External Devices: Attach NMEA 0183, NMEA 2000, or network cables as needed.
5. Secure Unit: Mount unit using provided hardware and torque screws to 2.2 N·m (20 in-lb).
6. Apply Power: Verify correct polarity before applying 10–32 Vdc power.

WARNING! Disconnect vessel's power before installation. Ensure all connections are waterproofed. Route cables away from moving parts and high heat.

First-Time Setup

Apply power; follow on-screen prompts.

1. Initial Power On: Unit will display splash screen and begin initial setup.
2. Language Selection: Select preferred language (default is ENGLISH).
3. Units Setup: Configure nautical units (nautical miles, knots, feet/fathoms).
4. Chart Orientation: Set to North Up or Course Up.
5. GPS Configuration: Allow unit to acquire satellite signal; may take several minutes.
6. System Check: Verify connected devices (radar, sounder) are recognized.

CAUTION! Ensure vessel is in open area with clear sky view for GPS acquisition.

Specifications

• Display Size: 8.4 inches diagonal.
• Display Resolution: 800 x 600 pixels, VGA.
• Waterproof Standard: IPX7.
• Power Requirements: 10–32 Vdc, 2.5 A max.
• GPS Receiver: High-sensitivity, WAAS enabled.
• Chart Storage: Internal memory; microSD card slot.
• Communication: NMEA 0183 (2 ports), NMEA 2000, Garmin Marine Network.
• Operating Temperature: -15° to 55°C (5° to 131°F).
• Dimensions (W x H x D): 222 x 177 x 64 mm (8.7 x 7.0 x 2.5 in).
• Weight: 1.6 kg (3.5 lb).

Controls and Settings

Access menus via front-panel buttons or optional remote. Front Panel: POWER, PAGE, ROCKER (up/down/enter), MENU, ZOOM IN/OUT.

On-Screen Menus: Main Menu provides access to Chart, Sonar, Radar, Routes, Waypoints, Tracks, System Settings.

Chart Settings: Detail, Color Scheme, Shallow/Deep Water Alarms. Navigation Settings: Arrival Alarm, Cross-Track Error, Waypoint Projection. System Settings: Units, Time, Alarms, Backlight, NMEA Setup. Sonar/Radar Settings: Range, Gain, Mode, Overlay Data.

Connecting Devices

NMEA 0183: Connect to compatible instruments (AIS, autopilot, wind, speed). NMEA 2000: Connect to backbone for plug-and-play sensor data. Garmin Marine Network: Connect to compatible radar, sonar, or other chartplotters.

1. Turn off power to all devices before connecting.
2. Use appropriate cables and connectors (supplied or purchased separately).
3. Seal connections with waterproof heat-shrink or sealant.
4. Configure NMEA sentences in System > Communications menu.

Tip: Label cables during installation for future service. Test each connection before final routing.

Using Navigation Features

Create and follow routes, mark waypoints, view sonar, and overlay radar.

1. View Chart: Press PAGE to cycle displays; default is Chart.
2. Mark Waypoint: Press MARK to save current position; edit name/symbol.
3. Create Route: Menu > Route > New Route; add points from chart or waypoint list.
4. Navigate: Select Go To for waypoint or Activate for route.
5. Sonar View: Connect compatible transducer; view depth, bottom contour, fish arches.
6. Radar Overlay: Connect compatible radar; overlay on chart for situational awareness.
7. Data Fields: Customize up to 8 data fields (SOG, COG, Depth, etc.).
8. Alarms: Set anchor drag, arrival, shallow/deep water, and off-course alarms.

WARNING! Navigation aids are supplemental. Always use official charts and maintain proper lookout.

System Integration

Integrate with Garmin GSD series sounders, GMR series radar, autopilots, and other instruments. Network multiple chartplotters for shared data.

Care & Cleaning

Disconnect power before cleaning. Use fresh water and mild soap with soft cloth. Do not use abrasive cleaners or solvents.

CAUTION! Ensure connectors and seals are intact. Do not submerge unit beyond IPX7 rating during cleaning.

Regulatory Information

FCC Compliance: Part 15 Class B digital device. CE Marked: Complies with EU directives. Industry Canada ICES-003. This device must not cause interference and must accept any interference received. For support, visit www.garmin.com/support or contact Garmin Product Support.

Troubleshooting

Reset: System > Settings > System > Master Reset (erases all user data).

Service: Contact Garmin Product Support or authorized dealer. Do not open unit; no user-serviceable parts inside.