1. Product Overview
The Quark-Elec QK-A027-plus is a commercial-grade AIS (Automatic Identification System) and GPS receiver designed for marine applications. It features advanced data multiplexing capabilities, integrating AIS and GPS data with NMEA 0183 inputs. The device offers versatile output options including NMEA 2000, NMEA 0183, WiFi, USB, and Ethernet, making it suitable for a wide range of navigation systems and display devices.
Key functionalities include receiving AIS messages from nearby vessels, obtaining precise GPS positioning data, and converting NMEA 0183 data to NMEA 2000 for seamless integration into modern marine networks.

Figure 1.1: Top-down view of the QK-A027-plus AIS+GPS Receiver, showing the brand and model information.
2. Setup and Installation
Proper installation is crucial for optimal performance of the QK-A027-plus. This device is designed for panel mounting.
2.1 Unboxing and Components
Before installation, ensure all components are present:
- QK-A027-plus AIS+GPS Receiver unit
- 1-meter NMEA 2000 drop cable
- Mounting hardware (if included)

Figure 2.1: The included 1-meter NMEA 2000 drop cable for network connection.
2.2 Physical Installation
- Mounting Location: Select a dry, protected location for panel mounting, away from direct sunlight and excessive heat. Ensure adequate ventilation.
- Antenna Connections: Connect your VHF antenna to the AIS antenna port and your GPS antenna to the GPS antenna port. Ensure secure connections.
- Power Connection: Connect the device to a stable 12V DC power source. Observe correct polarity.
2.3 Data Connections
The QK-A027-plus offers multiple data interfaces:
- NMEA 2000: Connect the supplied NMEA 2000 drop cable to your NMEA 2000 backbone. This allows for seamless integration with NMEA 2000 compatible displays and systems.
- NMEA 0183: Use the NMEA 0183 input/output terminals for connecting to legacy NMEA 0183 devices. The device includes a built-in NMEA 0183 to NMEA 2000 converter.
- USB: Connect to a PC for configuration, data monitoring, or use with navigation software.
- Ethernet: Connect to a network for data streaming to multiple devices or for remote access.
- WiFi: The integrated WiFi module allows wireless data streaming to tablets, smartphones, or other WiFi-enabled devices running navigation applications.

Figure 2.2: Rear view of the QK-A027-plus, highlighting the GPS, AIS, WiFi, and Ethernet ports for various connections.
3. Operation
Once properly installed and powered, the QK-A027-plus will begin receiving AIS and GPS data.
3.1 AIS Reception
The device passively receives AIS Class A and Class B messages from vessels equipped with AIS transponders. This data includes vessel name, call sign, MMSI, position, course, speed, and other navigational information. This information is then outputted via the configured interfaces.
3.2 GPS Functionality
The integrated GPS receiver provides accurate position, speed, and course over ground data. This data is essential for navigation and can be used by connected chartplotters or navigation software.
3.3 Data Output
The QK-A027-plus multiplexes all received data and outputs it simultaneously through its various interfaces:
- NMEA 2000: AIS and GPS data are converted into NMEA 2000 PGNs (Parameter Group Numbers) and transmitted over the NMEA 2000 network.
- NMEA 0183: Data is outputted in standard NMEA 0183 sentences.
- WiFi: Data is streamed wirelessly, typically over TCP/IP or UDP, allowing multiple devices to connect.
- USB: Data is available as a virtual COM port on a connected computer.
- Ethernet: Provides a stable wired network connection for data streaming.
4. Maintenance
The QK-A027-plus is designed for reliable operation with minimal maintenance. However, regular checks can ensure longevity and optimal performance.
- Cleaning: Periodically wipe the unit with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Connection Checks: Annually inspect all cable connections (power, antennas, data) for corrosion or looseness. Ensure they are securely fastened.
- Firmware Updates: Check the Quark-Elec website periodically for any available firmware updates. Follow the instructions provided with the update carefully.
- Environmental Protection: Ensure the unit remains in a dry environment, protected from direct water exposure, especially if not rated for outdoor use.
5. Troubleshooting
If you encounter issues with your QK-A027-plus, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power indication (LEDs off) | No power supply; incorrect wiring; blown fuse | Check power cable connection; verify power source voltage; inspect inline fuse if present. |
| No AIS targets displayed | AIS antenna not connected; poor antenna placement; no AIS traffic in area; software configuration issue | Ensure AIS antenna is securely connected; reposition antenna for clear view; check navigation software settings. |
| No GPS position fix | GPS antenna not connected; obstructed view of sky; faulty GPS antenna | Verify GPS antenna connection; move antenna to an unobstructed location; test with a known good GPS antenna. |
| Data not appearing on chartplotter/PC | Incorrect data port selected; baud rate mismatch; driver issues (for USB); network configuration problems | Confirm correct port and baud rate in software; install necessary USB drivers; check network settings for Ethernet/WiFi. |
If the problem persists after attempting these solutions, contact Quark-Elec customer support for further assistance.
6. Technical Specifications
The following table details the technical specifications of the QK-A027-plus AIS+GPS Receiver:
| Specification | Value |
|---|---|
| Brand | Quark-Elec |
| Model Name | QK-A027-plus NMEA 2000 AIS+GPS |
| Vehicle Service Type | Boat |
| Special Features | Ethernet, Wifi, USB |
| Connectivity Technology | USB, Ethernet |
| Map Type | Global |
| Included Components | 1m NMEA 2000 drop cable |
| Mounting Type | Panel Mount |
| Product Dimensions | 12L x 6W x 4.5H centimeters |
| Item Weight | 260 Grams |
7. Warranty and Support
Specific warranty details for the QK-A027-plus are not provided within this manual. For comprehensive warranty information, including terms, conditions, and duration, please refer to the official Quark-Elec website or contact your authorized dealer.
For technical support, troubleshooting assistance beyond what is covered in this manual, or inquiries regarding repairs, please visit the Quark-Elec support page or contact their customer service directly. Ensure you have your product model and any relevant purchase information ready when seeking support.







