On oceanographic cruises to the eastern Caribbean Sea in the spring of 1970 and again in 1972, 1750 drift bottles were released. A total of 65 returns (3.7 per cent) were recorded. During the 1972 cruise, a small but distinct shift in the drift pattern with time was observed in a group
of bottles released in a period of 1½ months in a relatively small area near St. Croix island. It is inferred from the results that the major part of the surface water crossing the Caribbean Sea from east to west enters that sea through the southeastern and not the northeastern passages.
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