New Surveying Launch Complete Trials -- The new motor survey launch 'Research undergoing her tests in the River Thanes.A new motor survey launch, built for the Port of Bristol authority, which has been designed, mainly, for the purpose of taking ***** and recording shiftings of ***** and sand banking, recently, carried out a series of successful tests on the River Thanes.The launch has been ***** 'Research' and was built at the the *****-on-Thames yard of Messrs. John Thornycroft Ltd. She is 53ft. in length with a beam of 12 ft. and adraft of about 3ft. 9ins. January 2, 1952. (Photo by United Kingdom Information Service).