F. P. Mawdsley, R. W. Drozdiak Construction of Sextant Angle Graphs with the Aid of a Computer PDF (English)
A. J. Kerr, T. V. Evangelatos, D. Marshall "Hypos" — A System for Processing Hydrographic Survey Data PDF (English)
D. R. Benson Long Range Navigational Warnings — A Suggested International World-Wide Scheme PDF (English)
Pierre Blaise, M. Paul Petry A Reply to the Article Entitled "Nominal Range" by Captain Aldo Macciavelli, Director of the Italian Naval Hydrographic Institute PDF (English)
E. Fichera, A. Pugliano Campaign for Determining the Longitude of the Fundamental Point of the Astronomic Observatory in Naples — V. Astronomic Longitude and Geographic Longitude PDF (English)
F. N. Spiess, Michael S. Loughridge, Maurice S. McGehee, D. E. Boegeman An Acoustic Transponder System PDF (English)
