WE report here preliminary results from data obtained from a new deep sea pressure gauge deployed for 96 d at a depth of 5,400 m in the Sargasso Sea. The instrument was in operation from August 21 to November 24, 1972 at 28° 24.5′ N, 69° 39.0′ W, 640 km south-west of Bermuda. The data obtained are the first deep ocean pressure records there; they reveal that for this region of the ocean, island tide gauge measurements may adequately represent the surrounding open ocean tides. The bottom temperature record shows a pronounced signal (1.2 m° C) at the tidal frequency, superimposed on unexplained sporadic large amplitude fluctuations (0.05° C) which last for several days.