Regulations concerning the organisation of the Hydrographic Service of the United States of Brazil PDF (English)
P. de Vanssay de Blavous The position at sea by radiogoniometric bearings taken on board PDF (English)
Use of the properties of a segment containing an angle in navigation and in hydrographic surveys PDF (English)
J. H. Hayes ECHO SOUNDING - XII: A. Report on sea trials of deep water echo sounding gear in H.M.S. Challenger and Ormonde PDF (English)
ECHO SOUNDING - XII: B. Echo sounding in motor boats. A description of the British Admiralty super-sonic shallow water echo sounding gear PDF (English)
H. Tscherning ECHO SOUNDING - XII: C. The new ultra-sonic sounders and their use in hydrography PDF (English)
Erratum & Addendum to Hydrograhic Review, Vol X, N° 1, May 1933, Slope corrections for echo soundings PDF (English)
Wilke Station pointer with station holders for hydrographic surveying during protracted use of the same terrestrial landmarks PDF (English)
R. Sigematu A brief note on the depths of the sea in the vicinity of the Mariana Islands PDF (English)
The CONNOLLY standard compass for checking field compasses and observing magnetic declination PDF (English)
