This report describes a techniques for removal of inertial navigation system drifts from winds measured by the NCAR Electra during the Frontal Air Sea Interaction Experiment (FASINEX) in 1986. Without correction, horizontal wind divergences calculated from these data may contain errors as large as 0.0001 per sec resulting from the Schuler oscillation. After correction, the divergence error is reduced by at least an order of magnitude. Correction coefficients and a subroutine to use them were provided for the five of six FASINEX flights for which correction was possible. Keywords: FASINEX, Aircraft meteorological measurements, and Atmospheric boundary layer.