An investigation of circular, finite queueing systems in amphibious operations.

Abstract

The general unloading phase of amphibious operations is examined with particular emphasis on the queueing problems that arise. A model is structured and a computer simulation is provided. Variables considered are the number of transfer vehicles and their speed and payload, the number and capacity of loading and unloading points, and the ship-to-shore distance. Basic relationships between the variables are examined and an approximating formula is developed for computing the _time required to unload a given tonnage of cargo. Applications in operational planning, system modification, and total system design are outlined. The impact on system performance of various assumed distributions of travel time and loading time is discussed. For systems employing mixed fleets of transfer vehicles, some basic decision rules are developed as to which vehicles to load or unload first. Suggestions as to further research and as to the model's general applicability are included.