The Phase-II report covers design, construction, and test of a prototype 2000 gpm oil recovery system for the high seas. The prototype system consists of a weir/basin assembly, transfer and control system, and auxiliary equipment which includes a handling system, packaging system, and a flotsam fence. The transfer system has four hydraulic-motor-driven gear pumps, a 300-ft. hydraulic umbilical, an oil-water interface sensor array, and a remote-control system. The report describes subsystems tests, component assembly, air transport capability, and a complete oil-recovery test in a pool at Battelle Northwest, Richland, Wa. Pool tests utilized light and heavy fuel oils in calm water and 2 foot waves, with tow speeds to 2.76 knots.