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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>SHIPBOARD DATA MULTIPLEX SYSTEM--ENGINEERING DEVELOPMENT ASPECTS AND APPLICATIONS</title>
      <link>https://trid.trb.org/View/82296</link>
      <description><![CDATA[The Shipboard Data Multiplex System (SDMS) is a general purpose information transfer system directed toward fulfilling the internal data intercommunication requirements of a variety of naval combatant ships and submarines in the 1980-1990 time frame.  The need for a modern data transfer system of the size and capability of SDMS has been increased in unison with the sophistication of shipboard electronic equipment and the associated magnitude of equipment-to-equipment signal traffic.  Instead of the miles of unique cabling that must be specifically designed for each ship, SDMS will meet information transfer needs with general-purpose multiplex cable that will be installed according to a standard plan that does not vary with changes to the ship's electronics suite.  Perhaps the greatest impact of SDMS will be the decoupling of ship subsystems from each other and from the ship.  Standard multiplex interfaces will avoid the cost and delay of modifying subsystems to make them compatible.  The ability to wire a new ship according to a standard multiplex cable plan, long before the ship subsystems are fully defined, frees both the ship and the subsystems to develop at their own pace, will allow compression of the development schedules and will provide ships with more advanced subsystems.  This paper describes the SDMS system as it is currently being developed in the Engineering Development stage by the U.S. Navy.  The results of preliminary design studies on the DDG-47 Class and SSN submarine platforms are also presented.]]></description>
      <pubDate>Wed, 25 Apr 1979 00:00:00 GMT</pubDate>
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      <title>REDUCTION OF ELECTRICAL CABLING COSTS -- INTRODUCING THE DATA HIGHWAY</title>
      <link>https://trid.trb.org/View/85110</link>
      <description><![CDATA[It is in the method of application of the data highway principle to specific vessels and functions where the advantages of cost reduction can best be seen.  The highest benefit accrues where long high density cable runs are at present used, for instance, in container ships for monitoring of refrigerated containers, and in special product carriers where multichannel monitoring may be required.  Further applications also lend themselves to the data highway concept, viz; remote monitoring and control of engine room from bridge, remote control of deck lights/navigation lights, remote temperature control and monitoring of cargoes, operation of tank valves, pumps etc. data logging.  In addition many domestic services can make use of the highway.]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/85110</guid>
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      <title>COST REDUCTION OF ULCC CARGO HANDLING SYSTEM USING COAXIAL DATA MULTIPLEXING</title>
      <link>https://trid.trb.org/View/47049</link>
      <description><![CDATA[Labor and material costs and the time required for outfitting a ULCC, or any ship of equal or greater outfit complexity, can be greatly reduced through the use of multiplexing.  This report describes multiplexing using a single, armored, coaxial cable which is wired in a continuous loop in the ship.  The system uses frequency modulation and digital techniques to communicate with remotely located control units.  Using low power semiconductor circuits, the electronics in the several control units are powered from a central, low voltage regulated source which allows the system to be an inherently safer autonomous working subsystem; totally self-sufficient and able to recover from various network failures that can occur over the life of the ship.]]></description>
      <pubDate>Tue, 26 Oct 1976 00:00:00 GMT</pubDate>
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      <title>MULTIPLEX INFORMATION TRANSFER SYSTEM (MITS)--A DESIGN FOR LOWER SHIP COST AND MORE EFFECTIVE AUTOMATION</title>
      <link>https://trid.trb.org/View/47017</link>
      <description><![CDATA[The trends in ship construction have been toward larger sizes, increased use of sensors located at widely dispersed locations, more automation to reduce manpower, and more complicated data processing for collision avoidance, load balancing, optimal speed/course control, etc.  The results of these trends are large increases in cable requirements, increases in labor/material costs, and longer construction time in shipyards, all of which result in higher ship cost. The Multiplex Information Transfer System (MITS) provides one approach to reducing the cost of ship construction and enabling more efficient automation of routine operations. MITS is a single information transfer system for the entire ship and is modular in design to fit a variety of ships. MITS lower costs by eliminating cables and simpifying ship construction.  It enables more effective automation because all data throughout the ship are available at any desired location in the ship.  Thus, functions such as automatic condition monitoring, remote propulsion control, equipment degradation analysis, etc., can be performed with greater simplicity than ever before.]]></description>
      <pubDate>Tue, 26 Oct 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/47017</guid>
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      <title>COST CONSIDERATIONS FOR ELECTRICAL/ELECTRONIC SYSTEM INSTALLATION DESIGN</title>
      <link>https://trid.trb.org/View/28592</link>
      <description><![CDATA[With the advent of limited budgets and increased system complexity, more intensive consideration of cost factors for various technical options must be undertaken at the design level.  It is the purpose of this paper to present certain general aspects of shipboard installation costs for electrical and electronic systems that may be used by the designer to plan a technically adequate installation for the least possible cost.  In order to more fully cover the subject, the paper begins with a brief discussion of the time value of money, the estimating process, and how the designer may evaluate cost against function.  This is followed by a discussion of standard material item cost (both procurement and local manufacture), lead time and general availability.  The paper closes with a set of recommendations to aid the designer in reducing system installation costs.]]></description>
      <pubDate>Wed, 05 Nov 1975 00:00:00 GMT</pubDate>
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