
         Raymarine Incorporated in Nashua, New Hampshire, 
         designs and manufactures electronic equipment for recreational 
         boating and light commercial marine markets. Raymarine's onboard instrumentation includes radars, chart plotters, fish finders and a personal computer, all connected 
          to a hsb2 (high-speed bus) token-passing network that is similar to 
          ARCNET technology.
          
          
          Contemporary Controls, Downers Grove, Illinois, a leader in ARCNET 
          connectivity products, was selected by Raymarine to develop a custom PC Card 
          interface to the hsb2 data network. This interface would connect laptop 
          computers to the navigation system providing flexibility and easy access 
        for the user.
"Contemporary 
          Controls' networking expertise allowed us to get the product up and running 
          quickly on the hsb2 network," said Matthew Thompson, Software Development Manager for Raymarine.
          
          The hsb2 interconnects all devices in the system so that they can share 
          radar, sonar and charting information. The hsb2 PC interface allows systems 
          to transmit high-speed data between the PCs and interact fully with all 
          other devices on the network. Twisted-pair cabling is employed with proprietary 
          waterproof connectors for protection against marine conditions.
          
          
          Thompson says since most systems configured are relatively small, between 
          three and five nodes, Raymarine chose a bus architecture not requiring 
          hubs.
          
          A key ingredient of the architecture is that multiple hsb2 devices can 
          be attached to one system, including multiple PCs. It's not unusual for 
          a boat to have several PCs installed in a flybridge and several more at 
          a lower helm station. 
          Thompson said his company was very satisfied by the work accomplished by Contemporary 
          Controls. "Initially, we evaluated whether we should build our own 
          interfaces or use existing products. It became clear that working with 
          Contemporary Controls would substantially shorten our development time 
          and reduce our costs. This has been primarily due to Contemporary Controls 
          ability to modify existing hardware to suit our needs and provide complete 
          Windows drivers for that hardware, allowing us to easily interface to 
          it."
          
          
          By working in conjunction with Contemporary Controls, Raymarine was able 
          to reduce their time to market and provide new connectivity solutions 
          for their marine navigation system.