Design and Development of the 190-Ton Stable Semisubmerged Platform (SSP)

[+] Author and Article Information
T. G. Lang

Advanced Concepts Division, Naval Undersea Center, San Diego, Calif.

J. D. Hightower, A. T. Strickland

Ocean Systems Division, Naval Undersea Center, Kailua, Hawaii

J. Eng. Ind 96(4), 1105-1111 (Nov 01, 1974) (7 pages) doi:10.1115/1.3438483 History: Received July 30, 1973; Online July 15, 2010


The general characteristics, design features, predicted performance, and construction highlights of the 190-ton Stable Semisubmerged Platform (SSP) are presented. The SSP is the first large manned version of a high-speed displacement craft concept having a small waterplane area. The SSP was designed to be a work platform for research and testing of advanced naval equipment at the Naval Undersea Center. Its unique design will provide an order-of magnitude improvement in motion reduction over monohulls, as well as provide more deck space and internal volume. The SSP is 89 feet long and has a top operating speed of 25 knots with about 25 tons of payload and fuel. Design of the SSP features two parallel torpedo-like hulls which support an above-water cross structure by means of four vertical surface-piercing struts; two canard fins are located near the hull bows and a cross stabilizing fin is located near the hull sterns. The SSP was constructed at the Coast Guard Shipyard at Curtis Bay, Md.

Copyright © 1974 by ASME
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