Measurements have been made from which the vertical directivity of ambient sea noise near the ocean bottom in water 14 500 ft deep has been computed. A vertical linear array of 40 hydrophones was used, with delay lines, to form 28 beams in directions from horizontal to vertically upward. Measurements were made at four fixed frequencies, 200, 400, 750, and 1500 cps, in a variety of weather conditions. The directional distribution of the noise is shown as a function of angle for three sea states at each frequency. It is found that at low sea state the noise distribution has a peak in the horizontal direction. As the sea state increases, the vertical and near-vertical contributions increase more rapidly than do the horizontal contributions.