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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>AN AT-SEA EXPERIMENT FOR THE COMPARATIVE EVALUATION OF RADAR PILOTING TECHNIQUES</title>
      <link>https://trid.trb.org/View/388329</link>
      <description><![CDATA[This report describes the second of two at-sea evaluations for a U.S.  Coast Guard program to determine the effectiveness of various fixed, floating, and electronic aids to navigation on harbor pilotage. During this experiment the USCG Cutter RED BIRCH made 52 transits of straight channel legs in the upper Chesapeake Bay with local pilots using four different pilotage techniques. They were: visual pilotage on ranges, traditional radar pilotage, radar course cursor piloting on a RACON (Radar Beacons), and pilotage using the Sperry CAS II PATH display. The experiment used pilots' accuracy of judging their position within the channel as a primary measure for comparing effectiveness of the pilotage techniques. Results indicated that visual pilotage produced the best performance and that traditional radar pilotage was substantially poorer.  The effectiveness of course cursor piloting on RACONS showed promise as a valuable technique, providing some of its implementation problems can be overcome. Use of the PATH display for pilotage proved only as effective as traditional radar, but there were indications that additional experience by the pilots would have substantially improved their performance. Recommendations are included both for improving the design of equipment and for further development of piloting techniques associated with the hardware.]]></description>
      <pubDate>Sun, 21 Jul 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/388329</guid>
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    <item>
      <title>EFFECT OF THE STRUCTURE OF THE COASTAL MARINE BOUNDARY-LAYER ON THE DETECTION OF SHIP TRACKS</title>
      <link>https://trid.trb.org/View/572254</link>
      <description><![CDATA[The goal of this research was to understand the mean cloud-topped boundary layer conditions that favor the persistence of cloud lines associated with ship tracks.  The specific objectives of this work were to determine how the diurnal variability of boundary layer affects the persistence of these tracks; to determine how variations on boundary layer structure associated with various coastal phenomenon affect the development and persistence of ship tracks; and to what extent the variations in ship track scales observed in satellite images can be tied to variations in coherent scales in the boundary layer.]]></description>
      <pubDate>Tue, 24 Jun 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/572254</guid>
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    <item>
      <title>APPLYING PROTOTYPE SHIP TRANSIT DATA TO SIMULATOR VALIDATION</title>
      <link>https://trid.trb.org/View/480932</link>
      <description><![CDATA[Differential Global Positioning System (DGPS) receivers use satellite transmissions to determine their location.  Data recorded from receivers mounted near the bow and stern of a vessel can produce ship track plots.  These plots, coupled with a log of pilot commands, provide marine simulators with the opportunity to compare simulator results with actual prototype transits.  The pilot's commands can be input during a simulation run and the resulting track plot compared with the prototype.  Or, results from a piloted simulation can be compared with the DGPS survey to see if the pilot used the same techniques on the simulator as they do in real life. Analysis of the DGPS survey results suggest DGPS can be an effective tool to assist during simulation model validation.]]></description>
      <pubDate>Thu, 27 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/480932</guid>
    </item>
    <item>
      <title>SHIP MOVEMENT MONITORING SYSTEM WITH GLOBAL POSITIONING AS BASIS</title>
      <link>https://trid.trb.org/View/449330</link>
      <description><![CDATA[With a global positioning system as a basis, a ship movement monitoring centre employs synthetically advanced positioning techniques, communication data processing and chart displays for monitoring, tracking and management of ships.  The design principles, technical characteristics, components and applications are discussed.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/449330</guid>
    </item>
    <item>
      <title>MARINE TRACKING AND MANAGEMENT SYSTEM</title>
      <link>https://trid.trb.org/View/447414</link>
      <description><![CDATA[The architecture and working principles of a marine vessel tracking and management system are presented.  The functions, technical specifications, applications and technical problems of the system are discussed.]]></description>
      <pubDate>Mon, 14 Aug 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/447414</guid>
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    <item>
      <title>AN IMPROVED PROCEDURE FOR ADAPTIVE ESTIMATION OF MANEUVERING IN A SHIP TRACKING ALGORITHM</title>
      <link>https://trid.trb.org/View/392374</link>
      <description><![CDATA[A modification is developed for both variants of the single-target ship tracking algorithm of NRL Memorandum Report 4579 (AD-A104-805). The modification is an improvement in the adaptive procedure for estimating the amount of the ship's maneuvering from reports of its location, which can be bearing-only reports in one of the two variants. Tracking performance is improved most markedly when the report occurrences are highly irregular. Experimental FORTRAN implementations and numerical examples are given.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/392374</guid>
    </item>
    <item>
      <title>SIMULATION ANALYSIS OF THE EXXON VALDEZ GROUNDING IN PRINCE WILLIAM SOUND</title>
      <link>https://trid.trb.org/View/400248</link>
      <description><![CDATA[Results are reported of a simulation-based analysis conducted for the National Transportation Safety Board of the EXXON VALDEZ's trackline immediately prior to its grounding in Prince William Sound. The tasks performed in this study included: (1) developing a trajectory for the outbound transit of the vessel from Entrance Island through Valdez Narrows and Valdez Arm to the grounding site on Bligh Reef; (2) developing the trajectories starting with the vessel heading 180 deg on a trackline 1 nautical mile west of Busby Island light, at a speed of 12.3 knots and at the speed determined at the respective time on the trackline generated in Task 1 for four specified conditions; and (3) determining the most probable point on the 180 deg trackline where the rudder would have been applied to cause the vessel to reach the grounding site for the four specified rudder applications. The information utilized originated from both the ship and the U.S. Coast Guard's vessel traffic center in Valdez, Alaska. Appendices include various charts and logs.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/400248</guid>
    </item>
    <item>
      <title>MANUAL FOR THE PREPARATION, PLANNING AND CONDUCT OF PASSAGES</title>
      <link>https://trid.trb.org/View/388374</link>
      <description><![CDATA[Among topics covered by this manual are: navigational aids; aids to communication; coastal navigation; navigation under pilotage; monitoring the ship's track; choice of route; and, conducting and monitoring the passage plan.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/388374</guid>
    </item>
    <item>
      <title>COST 301 FINAL REPORT--ANNEX TO MAIN REPORT, VOLUME 8: INVESTIGATIONS OF FEASIBILITY AND COST OF IMPLEMENTATION</title>
      <link>https://trid.trb.org/View/400000</link>
      <description><![CDATA[This volume presents a more detailed description of the work and findings of COST 301 that are discussed in Chapter 8, "Investigations of Feasibility and Cost of Implementation," of the Main Report, AN 8835.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/400000</guid>
    </item>
    <item>
      <title>DYNAMIC POSITIONING USING DISTRIBUTED CONTROLS WITH IMBEDDED EXPERT SYSTEM</title>
      <link>https://trid.trb.org/View/400082</link>
      <description><![CDATA[Dynamic positioning (DP) systems have been used extensively to provide station-keeping and tracking capabilities on many types of vessels. While the algorithms and mathematical processes required for DP calculations have been well documented many problems related to implementation remain.  This paper discusses the implementation problems of the traditional systems approach, and points out the enhancements that can be achieved in implementing DP through the use of a system of distributed controls with an imbedded expert system. The author presents an overview of the distributed control system architecture and analyzes its operational functions.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/400082</guid>
    </item>
    <item>
      <title>THE REQUIREMENTS OF DATA ACQUISITION FROM A SHIP TRACKING TEST</title>
      <link>https://trid.trb.org/View/159156</link>
      <description><![CDATA[Various applications for the data obtained from ship tracking exercises are outlined and requirements are proposed for the most exacting use of such tests. Some possible methods of making the required measurements are listed and finally a few remarks are given on one method of analysing the data.]]></description>
      <pubDate>Thu, 12 Mar 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/159156</guid>
    </item>
    <item>
      <title>AN APPLICATION OF KALMAN FILTER TO THE DISCRETE TIME ROUTE TRACKING OF SHIPS</title>
      <link>https://trid.trb.org/View/159180</link>
      <description><![CDATA[The discrete time optimal route tracking system of ships is considered under the position fix error and the system disturbances.  In this system, the position fix and control are made at the appropriate time intervals.  Measurement data, which contain measurement error, are put into the Kalman filter to obtain the optimal estimation of state variables. Making use of this estimation, the optimal course and speed correction are calculated by Dynamic Programming technique.  These correction are then executed during the next time interval.  The variance of route tracking error can be expressed as a function of the length of control position fix errors and system disturbances.  Therefore, better accuracy of route tracking can be attained by the shorter interval of control as well as the better position fix devices.]]></description>
      <pubDate>Thu, 12 Mar 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/159180</guid>
    </item>
    <item>
      <title>RELATIONSHIP OF SHIP SIZE TO TRANSIT PERFORMANCE IN A CHANNEL SECTION CONTAINING CROSS CURRENT</title>
      <link>https://trid.trb.org/View/159098</link>
      <description><![CDATA[Special environmental conditions occur in many restricted waterways which provide a challenge to transiting navigators.  One condition found in some harbors is a waterway section where a significant current enters from the side at an angle to the transit path and gradually realigns its direction to coincide with the transit path. A recent study conducted at CAORF provides an insight into the difficulties of maneuvering through this current condition and the effect of ship size and the degree of difficulty. Results and observations from the study are presented.  The process followed in conducting the study described in the paper suggests the general methodology for studying special environmental conditions in specific waterways.]]></description>
      <pubDate>Fri, 06 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/159098</guid>
    </item>
    <item>
      <title>DEVELOPMENT AND VERIFICATION OF MATHEMATICAL MODELS FOR SHIPHANDLING SIMULATORS</title>
      <link>https://trid.trb.org/View/149130</link>
      <description><![CDATA[An effort has been made to develop maneuvering motion prediction capability (i.e., digital-computer simulation capability) or real ships proceeding under various conditions with changes in ship loading and water depth. Presented here are the results of maneuvering characteristics and ship trajectories predicted through computer-aided analysis and utilizing the model test results.  Also included are the encouraging correlations between predictions and trial results.  In an effort to improve the mathematical model, which represents ship maneuvering motion under actual operating conditions, vessel tracking measurements were made on the 80,000 DWT tanker during transit in New York Harbor waterways.  Application of these results has been made to a variety of harbor configurations from the viewpoint of maneuvering safety during harbor transit.]]></description>
      <pubDate>Tue, 22 Apr 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/149130</guid>
    </item>
    <item>
      <title>VESSEL TRAFFIC SERVICES PROCESSING/DISPLAY SUBSYSTEM DETAILED SOFTWARE DESIGN OPERATING SYSTEM</title>
      <link>https://trid.trb.org/View/145093</link>
      <description><![CDATA[This report provides the detailed design of an operating system which can support the VTS application in a multicomputer, high reliability environment.  Since computer hardware has not been selected, the design represents a generalized operating system which can be implemented on a wide variety of minicomputer sytems which the Coast Guard may wish to select for the VTS Processing/Display Subsystem. The discussion here includes an overview of the Executive, a detailed description, as well as structure charts, Program Design Language specifications and a description of the system data structures used by the Executive.  Basic considerations for the design and implementation of fault tolerant software, with specific application to VTS, are also presented.  In conclusion constraints on hardware selection and assumptions that were made concerning manufacturer-provided development software, in regard to this VTS/OS design, are cited.]]></description>
      <pubDate>Tue, 22 Apr 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/145093</guid>
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