Abstract
Abstract HYDROSWEEP, a new wide‐angle, fanshaped sonar system with 59 preformed beams, was developed in the 1980s in the Federal Republic of Germany and installed on the new German research vessel Meteor. Deep‐sea tests and especially comparisons with SEABEAM measurements were performed during the Meteor cruises M 4/1 in 1986 and M 6/4 in 1987/88. This article deals with investigations and tests in the Gulf of Biscay and in the Romanche Fracture Zone. In 1984 calibration measurements were carried out with SEABEAM on the German ice‐breaking research vessel Polarstern in the deepest part of the Romanche Fracture Zone. For comparison the identical profiles were remeasured with the new HYDROSWEEP. GPS/NAVSTAR and the Integrated Navigation System INS were used for positioning on the Meteor.
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