Developing Tanker Casualty and Tanker Traffic Databases for 1969-1977

摘要

This report presents the results of a program to develop and analyze two databases. The first was to extend the existing Coast Guard Tanker Casualty File (1969-1973) for an additional four years (1974-1979). Incorporated with the extension of the data was an expansion of database to include a broader range of information related to the sequence of the casualty, extent of pollution, damages incurred, and identification of the source of the casualty information. The second database developed was a file of tanker movements, based on a computerized version of the 'Lloyd's Voyage Record' for the year ending December 1976. This file contains a series of records listing dates and location changes for each tanker during this year. The development of this second database permits the casualty statistics to be related to various vessel and crew measures of exposure, e.g., polluting casualties per ton of oil transported per mile, etc. Finally the report contains a trend analysis of the tanker casualty database. Oil outflow from polluting casualties is examined from the standpoint of tanker size, tanker age, geographic location, area (pier, harbor, open sea, etc.) and flag of registry. The distribution of repair costs by casualty type and the sequence of events preceding tanker sinkings are also examined. (Author)