José Augusto Barahona Fernandes The Use of Raydist in the Survey of a Bank offshore Lourenço Marques PDF
P. O. Fagerholm, A. Thunberg Electronic Positioning in Swedish Coastal Hydrographic Surveys: (A report on operational trials primarily with the Hydrodist MRB 2 in 1961–62) PDF
P. Hugon Application of the Hi-Fix System in the Measurement of the Speed of Ships and the Assessment of their Steering Qualities: (Trials at sea of the liner France in November and December 1961) PDF
M. Deck, M. Louis, P. Didey Complementary Investigations of the Calibration Error of the Tellurometer PDF
