Intermittent data from acoustic transmission (hourly or bi-hourly ever third day) to be obtained in an acoustic tomography experiment in 1981 will be analyzed for tides so that the tidal effect can be removed. Two methods of analyzing the tides (1) tidal interpolation across 75 hours to patch the series, followed by response analysis, and (2) harmonic analysis with corrections for interference by nearby constituents, have been tested with a real set of acoustic extended phase data. The results by the two methods are found to be consistent and adequate.