Some recent oceanographic surveys of the Gulf of Mexico

An apparently semi‐permanent, large scale, anti‐cyclonic eddy repeatedly observed on four earlier oceanographic surveys was investigated in greater detail during Cruise 54‐10 of the A . A. Jakkula, August–September, 1954. Evidence from the five surveys made in the region in tne eddy indicates that the eddy is an integral part of the Gulf Stream system in the Gulf of Mexico. From the single ship survey of Cruise 54‐10 an attempt was made (1) to locate and define the eddy and (2) to establish whether or not it was a temporary or permanent feature of the Gulf of Mexico and the Yucatan Current or to determine whether or not it changed physically in space and time or both.