Accurate prestack partial migration operators are important in seismic exploration. The development of different technologies, like the use of PS converted wave data, suggests the extension of applications of already successful operators and techniques for PP data. Azimuth moveout (AMO) is a partial migration operator that transforms prestack data into equivalent data with arbitrary offset and azimuth. We introduce a new, more accurate prestack partial migration operator for converted wave data. This operator has promising future applications in the regularization of ocean bottom seismic data.