LARGE HIGH SPEED SURFACE SHIP TECHNOLOGY

The Surface Effect Ship Program currently underway in the US Navy is structured to achieve large displacement (2,000-4,000 tons), high speed (80-100 knots) ships in the next decade. The present paper outlines some of the key technical areas requiring development. Data are presented from the two current 100 ton displacement SES, namely, the waterjet-propelled SES-100A and the waterscrew-propelled SES-100B, and from other sources to demonstrate that progress is being made and that challenging work remains to be done. Specific attention is given to the seakeeping and ride quality of SES at high speed in rough seas, and approaches for solution are discussed. The important topics of seal characteristics and inlet design are also discussed to suggest avenues for improvement and the need for development.