This approach to "solar sailing" is perhaps technically more interesting: http://www.solarsailor.com/index.htm All the best... Bruce -- ======================================================================= L. Bruce Jones U.S. SUBMARINES, INC. President POSEIDON UNDERSEA RESORTS LLC Tel: 208/687-9057 Fax: 208/441-7478 E-mail: bruce@ussubmarines.com http://ussubs.com http://poseidonresorts.com "Design, engineering and construction of submarines and submersibles" "Submarine related consulting, sales and operations." =======================================================================