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The work reported is the result of an analysis of post-nuclear-attack railroad operation in 12 rail activity centers. The analysis has been based upon the transportation of a single commodity--food. The selected nuclear attack involved 375 4-megaton weapons directed against retaliatory bases and industrial and population centers. The determination of post-attack food transportation requirements was based on the number and location of survivors by county, or similar divisions, and the geographical configuration of surviving yards and rail lines. Interstate food shipments were traced from the point where each rail activity center would be entered to points within 5 or 10 miles of survivors. Supply routes were selected by which food deliveries could be economically made to all survivors and empty freight cars removed. Traffic patterns were established together with yard assignments and requirements for rolling stock. The capability of the rail facilities to accommodate additional traffic was also determined.

The report describes the procedures that were used to evaluate the preliminary designs of advanced landing craft as part of the Navy's Advanced Amphibious Landing Craft Program. The procedures were applied initially to more than 30 different existing and proposed landing craft, and complete analysis was made for five advanced craft after screening out marginal craft at each stage of the analysis. Measures of effectiveness used were Force-Time Effectiveness, Time to Deliver 200,000 sq ft of Vehicles Ashore, Marine Forces or Cargo Lost, Response Time, Mean Productivity per Craft by Type, and Mean Cargo Transfer Rates. Standoff distances of 5 and 25 nautical miles were used. The computer programs used in the analysis were provided by SRI and the Naval Weapons Laboratory. Data are presented bearing on the effectiveness of each type of craft and each craft mix. A description also is given of the SRI program GAMUT, which is a simulation covering much the same ground as the STS-2 package but with a great reduction in the level of detail that is considered. It provides the means of rapidly and cheaply changing the input conditions and operating procedures used in the simulation. Selected preliminary results of the GAMUT model are given.