A set of 50 directional spectra of surface waves in the North Pacific Ocean, covering a 26-day period in September 1963, has been derived from pressure and acceleration sensors attached to the manned spar buoy, FLIP, located near 39° 20'N, 148° 30'W. Results are given as ampiitudes and directions associated with the first two harmonics of the directional distribution. New analyses enabling full interpretation of these parameters are also presented.