During the ICES Expedition Overflow '73, which had a core period of observation between 15 August and 15 September 1973, there was, for the first time, an opportunity to investigate synoptically the details of the ocean circulation between Greenland and Scotland. This area had hitherto attracted considerable attention because it was believed to be the scene of the exchange of warm saline Atlantic waters with the colder and less saline waters of the Norwegian Sea. The Project was designed as a follow up to Overflow '60.One of the principal objectives of Overflow '73 was to describe in detail the kinematic and dynamic processes which leads to the renewal, by 'shoves' of the sub-Arctic bottom water of the northern North Atlantic across the Iceland-Faroe Ridge and the steadier renewals known to occur in the Denmark Strait and the Faroe-Shetland and Faroe-bank Channels. During the expedition more that 1700 serial hydrochemical/CTD stations were worked, and 52 current meter moorings were deployed and recovered. In addition numerous anciliary measurements were made, including XBTs, tide measurements and drogue tracking. More information may be obtained from the Overflow 73 chief scientist ( Prof J. Meincke - mailto:meincke@meer.ifm.uni-hamburg.de ) or the ICES Oceanography Secretary.Version 2010-07-19, see 'Other version'