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The relentlessly harsh conditions at sea places special challenges on networking equipment, and devices must adhere to strict specifications and certifications for size, ruggedness, and reliability. Specially certified products from Moxa have helped devices communicate with each other at sea and on offshore sites.

1. Embedded Computers on an Open Deck
2. Real-time networked sonar system for ships
3. Marine Computers

Embedded Computers on an Open Deck

Marine transportation, harbor authorities, and offshore oil and gas platforms all rely on real-time and reliable marine as well as weather data to ensure safe operations. Both real-time and historical data for analyses and early warnings are critical to help decision makers with the control and planning of marine transportation applications. The customer adopted Moxa's industrial-grade Ethernet switches to form a VESSEL LAN system that constitutes a communication network between the operator devices on the bridge and devices in the hull and engineering room.

System Requirements

• DNV and GL certified network solutions to ensure reliable operations in marine and offshore environments.
• Network redundancy with a fast recovery time, which is required to guarantee stable data transmission.
• Rugged design to withstand harsh environmental conditions, such as vibration, shock, and humidity.
• SCADA support with SNMP OPC server.
• Multi-mode fiber options to avoid interference and improve long-distance transmission.

Moxa Solution

A vessel instrument communication system was developed to provide operators and users with different navigational data from weather reports, radar/sonar systems, and position control instruments. The communication system can be used to identify and track ships and other navigational objects when at sea or when sailing in coastal areas. Moxa's industrial Ethernet switches were selected for this application to build a communication network for dual-hull vessels.

The EDS-408A managed Ethernet switches were deployed on the bridge and in the engineering room. Together with the propeller and side thruster control, Moxa's EDS-408A Ethernet switches form a ring network for data transmission. The EDS-408A on the bridge connects to a workstation with a 19" LCD panel. The PC-based workstation can interface different types of loggers and sensors to display information on the screen, perform calculations, and process different oceanographic and meteorological data. The system allows the pilot to obtain useful real-time information and operate the vessel smoothly and safely when near the dock.

Moxa's EDS-SNMP OPC Server Pro is used to provide a user-editable tag file for SNMP devices. This powerful function lets operators use existing HMI software to create a customized, real-time view of the integrity of all Ethernet networked
devices, the overall network traffic volume, and the network status.


EDS-408A Gigabit Managed Ethernet Switch
• Plug-n-Play Turbo Ring with fast recovery time under 20 ms
• DNV and GL certified for marine applications
• -40 to 75°C wide operating temperature range
• Automatic warning by exception through email and relay output
• User-friendly web-based configuration and managementring
• Easy to create and edit the configuration of connected devices in advance
• Easy to create and edit the MIB Template for dedicated tag file of any SNMP device
• User-definable tag file meets the requirements of many different applications

Real-time networked sonar system for ships

The company produces products and systems used by merchant vessels and offshore installations for positioning, navigation, and automation, as well as products and systems for surveying and monitoring the seabed, and for fishing vessels and fisheries research. As one of the major suppliers of high quality marine electronics in the world, their products include chart plotters for yachts, triple redundant dynamic positioning systems for oil drilling rigs, and sonar and instrument systems for scientific research vessels.
Products used for marine applications must be rugged enough to endure the corrosive effects of salt water, and be able to withstand excessive amounts of vibration and shock. For this reason, the company only uses products and components that are DNV and GL certified to ensure that their systems can meet the high standards required by the maritime industry.

Moxa Solution

The sonar positioning system requires a high-speed network to connect devices in the hull unit room with other devices on the bridge. In addition to requiring components that are DNV and GL certified, speed and redundancy are also important considerations. For this reason, the sonar positioning system uses MOXA’s managed Ethernet switches to form a redundant network between the sonar system in the hull, and electronic devices on the bridge.
Each sonar unit uses one transmit transducer array and one receive transducer array that link to the main transceiver for detecting objects under water. MOXA’s EDS-518A managed switch is used in the hull unit room to connect to different sonar devices, and the EDS-510A-1GT2SFP is housed on the bridge. Together, the switches create a gigabit redundant ring that connects the sonar system to the bridge. Note that the EDS-518A’s two gigabit ports connect to two of the EDS-510A’s three gigabit ports to form the redundant gigabit backbone. The third gigabit port on the EDS-510A is used to send a data log (which could involve massive amounts of data) to the operations station.
Transceivers are installed in different parts of a ship for different types of applications. For anti-submarine and mine detection applications for example, the transceiver would be located near the bow of the ship. On the other hand, for commercial and research type vessels, the transceiver would be located near the stern. The Ethernet network allows the system to transmit signals from the sonar to the ship’s bridge in real time. This is particularly important for anti-submarine and mine detection applications, since having access to real-time information is essential for the survival of the ship and its crew.


16+2G-port Gigabit managed Ethernet switches
7+3G-port Gigabit managed Ethernet switches

Marine Computers

A leading multinational marine company needed a more reliable computer to use in marine radar, ECDIS, and conning systems. In the past, they relied on computers that used add-in graphics cards for display output and were built with fans and cables. However, they discovered that the computers they used were highly unreliable, caused significant downtime, and also imposed high system deployment costs. It was time to find a better, more reliable solution for their marine applications.
• Reliable computers for stable operations 
• Small form factor that suits the onboard environment 
• Multiple interfaces to support many device connections 
• HDD/SSD protection for more reliable data storage 
• DNV 2.4 certification 
• EC 60945/61162/IACS-E10 compliance

Moxa Solution

Moxa's MC-5750 marine computers (a customized version of the MC-4510-C23 computers) were designed for exactly the sort of systems the company was building, and emerged as a far more reliable and capable solution. The MC-5750 works with radar systems as a radar information display, and is also a capable data collection system when connected to devices such as serial NMEA or wind RPN sensors. The customer's MC-5750 computers were also customized with three reserved ports that the customer can use to attach their own development board.
MC-5750 computers have two display outputs, VGA and DVI-I, to enable dual screens to display Gyro, GPS, event log, and AIS information. Network communications are reliable thanks to network redundancy from dual 10/100/1000 Mbps LAN ports.
Most importantly, MC-5750 computers sport storage trays with strong vibration and shock resistance, to secure the reliability of HDD and SDD drives and prevent data loss in high-vibration marine environments.
Moxa's MPC-122-K panel computers complete the marine system. The high-quality industrial-grade panel display delivers high performance and reliable operations in maritime operations.


x86-based industrial embedded computer with Intel Core 2 Duo, 2 optically-isolated serial ports, 2 Gigabit LANs, CompactFlash, dual displays, audio, 6 USB ports
x86 marine panel computers with Intel Core 2 Duo 2.26 GHz, VGA, DVI, audio, 2 Gigabit LANs, 2 serial ports, 7 USB 2.0 ports, CompactFlash


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