1. Quantity of 3 ships， classification society IACS (such as BV)， meet the HSC code (High Speed boat specification) 2. Catamaran or monohull 3. Aluminum alloy， steel or steel plus aluminum alloy are acceptable 4. Speed 20Knots @ 85% MCR 5. 25 passengers 6. 8 crew members with crew living rooms 7. Deck area 35-40 square meters 8. Deck bearing 2t/m2， just with a little light goods， tools and the like 9. Fresh water tank at least 4t 10. Transport crew on platforms and shore beyond the navigation area of 100-250 nautical miles 11. No deck crane required