Various aspects of near-bottom ocean variability, including the alongshore temperature and current, the cross-slope temperature, the onshore-offshore flow, and the area-averaged relative vorticity on the western slope of the Florida Strait near 27 ¿N have been measured with a three-point acoustic reciprocal transmission. Three pairs of reciprocal travel time data were extracted from acoustic pulse responses of a 1983 (August) triangular transmission experiment. Temperatures and currents were estimated from the sum and difference, respectively, of reciprocal travel times, and an area-averaged vorticity was estimated from circulation following Stokes' theorem. The estimations agree well with the concurrent direct measurements at two nearby moorings. Low-frequency fluctuations of temperatures, currents, and vorticity show a strong weekly period, clearly and consistently describing a near-bottom onshore-offshore water movement on the western slope in association with the Gulf Stream meanders. ¿ American Geophysical Union 1989