1. Introduction
The FURUNO GP170 IMO Navigator is a highly stable and reliable position fixing system designed for marine vessels, large yachts, ferries, and commercial ships. It serves as an optimal position sensor for integration with radar, AIS, ECDIS, autopilots, echo sounders, and other navigation and communication equipment.
This manual provides essential information for the proper setup, operation, and maintenance of your GP170 IMO Navigator.
2. Product Overview
The GP170 features a newly designed GPS chip and antenna to enhance the stability and accuracy of position fixing. Its new receiver incorporates noise rejection capabilities, offering high tolerance against interference and multipath mitigation. When used with GPA020S or GPA021S antenna units, multipath tolerance is further strengthened.
Various display modes are available, including Plotter, Course, Highway, Data, and Integrity. The Integrity display mode provides highly accurate Skyplot presentations of currently visible satellites, GNSS/SBAS signal reception status including strength and SNR, elevation angles of available satellites, and detailed information on available beacons for enhanced accuracy using SBAS.
With a 10Hz (0.1 second) position update rate, stable own ship tracking is possible. It includes a front panel USB port for exporting/importing routing data, menu settings, and user settings. The unit also features a LAN interface compatible with BAM (Bridge Alert Management) for simple and efficient network integration into bridge systems (IEC 61162-450).
Figure 1: FURUNO GP170 IMO Navigator Display Unit
This image shows the main display unit of the FURUNO GP170 IMO Navigator. The screen displays critical navigation information such as latitude and longitude, bearing, course over ground (COG), range, and estimated time of arrival (ETA). On the right side of the display, there are various control buttons for menu navigation, display modes, route management, zoom functions, and brightness adjustment. The unit is designed for clear visibility and easy operation in a marine environment.
3. Setup
3.1 Unpacking and Inspection
Carefully unpack all components and verify that all items listed in the packing list are present and undamaged. Report any discrepancies or damage to your dealer immediately.
3.2 Mounting the Display Unit
Select a suitable location for the display unit, ensuring it is protected from direct sunlight, excessive vibration, and extreme temperatures. Ensure adequate ventilation around the unit. Use the provided mounting bracket and hardware to securely fasten the display unit.
3.3 Antenna Installation
Install the GPS antenna (GPA020S or GPA021S, sold separately) in a location with a clear, unobstructed view of the sky, free from interference from other electronic equipment or structures on the vessel. Route the antenna cable carefully, avoiding sharp bends and potential damage.
3.4 Power Connection
Connect the power cable to a stable 12-24 VDC power source. Ensure proper polarity and use appropriate circuit protection (fuse/breaker) as specified in the installation guide. Refer to the detailed wiring diagram in the full installation manual for specific connections.
3.5 Interfacing with Other Equipment
The GP170 supports various interfaces for connection to other navigation systems like radar, AIS, ECDIS, and autopilots. Use NMEA 0183 or IEC 61162-450 (LAN) for data exchange. Consult the full installation manual for detailed interface specifications and wiring diagrams.
4. Operating Instructions
4.1 Powering On/Off
Press the POWER button (located on the lower right of the control panel) to turn the unit on or off. The unit will perform a self-test upon startup.
4.2 Basic Navigation and Menu Operation
Use the directional arrow keys to navigate through menus and adjust settings. The MENU/ESC button accesses the main menu and acts as an escape key. The NU/CU/ENT button confirms selections.
- DISPLAY: Cycle through various display modes (Plotter, Course, Highway, Data, Integrity).
- ROUTE: Access route planning and management functions.
- GO TO: Initiate direct navigation to a specific waypoint.
- MOB (Man Overboard): Mark the current position as a Man Overboard event for quick navigation back.
- MARK/EVENT: Create and manage user marks or events.
- PLOT ON/OFF: Toggle the plotter display.
- ZOOM IN/OUT: Adjust the map zoom level.
- CENTER: Re-center the map on the vessel's current position.
- ACK/DELETE: Acknowledge alarms or delete selected items.
- CURSOR ON/OFF: Activate or deactivate the cursor for map interaction.
- BRILL (Brightness): Adjust display brightness.
4.3 Data Export/Import via USB
The front panel USB port allows for convenient export and import of routing data, menu settings, and user settings. Insert a compatible USB drive into the port and follow the on-screen prompts to manage data.
5. Maintenance
5.1 Cleaning the Display Unit
Wipe the display screen and unit casing with a soft, damp cloth. Do not use abrasive cleaners or solvents, as they may damage the surface. Ensure the unit is powered off before cleaning.
5.2 Cable and Connector Inspection
Periodically inspect all cables and connectors for signs of wear, corrosion, or damage. Ensure all connections are secure to maintain optimal performance and prevent water ingress.
5.3 Software Updates
Check the FURUNO website or consult your dealer for information on available software updates. Keeping the software updated ensures optimal performance and access to new features.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | No power supply; Blown fuse; Loose connection. | Check power cable connection; Inspect fuse/breaker; Ensure secure connections. |
| No GPS position fix. | Antenna obstructed; Faulty antenna cable; Poor satellite visibility. | Check antenna placement for obstructions; Inspect antenna cable; Wait for better satellite conditions. |
| Display is dim or unreadable. | Brightness setting too low; Unit overheating. | Adjust brightness using the BRILL button; Ensure adequate ventilation around the unit. |
If the problem persists after attempting these solutions, please contact your authorized FURUNO service dealer.
7. Specifications
- Display Size: 5.7 inches
- Display Type: Color LCD
- Power Supply: 12-24 VDC
- Receiver Type: GPS
- Position Update Rate: 10Hz (0.1 second)
- Connectivity: USB (front panel), LAN (IEC 61162-450)
- Product Dimensions: 50.8 x 27.94 x 22.86 cm (20 x 11 x 9 inches)
- Product Weight: 5.08 kg (11.2 lbs)
- Model Number: DFU-235 (Product Model Number), GP170 (GPS Navigator Model)
8. Warranty and Support
For warranty information, please refer to the warranty card included with your product or visit the official FURUNO website. For technical support, service, or inquiries, please contact your local authorized FURUNO dealer or distributor. Ensure you have your product model and serial number available when seeking support.
Note: WAAS (Wide Area Augmentation System) is not supported by this model.
