Accession Number : ADA082161


Title :   Classification of Intact Stability Standards for Dynamically Supported Craft.


Descriptive Note : Final rept. Jul-Oct 79 on Phase 1,


Corporate Author : BAND LAVIS AND ASSOCIATES INC SEVERNA PARK MD


Personal Author(s) : Lavis,David R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a082161.pdf


Report Date : Oct 1979


Pagination or Media Count : 122


Abstract : In recent years there has been an increasing employment of high-speed marine craft dependent on dynamic and air-cushion lift for support and stability. Existing regulations for the safety of ships and craft at sea are based upon displacement mode operation and cannot adequately be applied to high-speed craft when operating with their dynamic or air cushion means of support. As a result, the U.S. Coast Guard has begun a study of stability standards for such craft which is being carried out as part of the Coast Guard's overall Commercial Vessel Safety (CVS) Program. This report presents the results of the second (or classification) task of four-task study of intact-stability standards. Four broad categories of dynamically supported craft are examined: Amphibious Air-Cushion Vehicles (ACV), Rigid-Sidehull Surface-Effect Ships (SES), Hydrofoil Craft & Planing Craft. The different methods by which stability in the nondisplacement mode is achieved by each of these categories is examined, along with the various stability related operational hazards to which they can be subjected. Existing stability standards are reviewed. From these examinations and from the results of the background study prepared as Task 1, the four categories of dynamically supported craft considered have been divided into classes for which the same, or similar intact stability standards can apply. Tasks III and IV which have not yet been initiated are designed for the detailed investigation of stability parameters and for the development of recommended stability standards for one, or more, of the categories of craft examined. (Author)


Descriptors :   *SURFACE EFFECT SHIPS , *AIR CUSHION VEHICLES , *HYDROFOIL CRAFT , STABILITY , HAZARDS , SAFETY , STANDARDS , COAST GUARD


Subject Categories : Surface Effect Vehicles & Amphibious Vehicles


Distribution Statement : APPROVED FOR PUBLIC RELEASE