Use of subtense board in conjunction with echo sounding in River Tyne area; range and form of board; theoretical errors and considerations; refractive error; sounding errors; particulars of echo sounding launch Lynceus; sextants in use; possible improvements in boat design; sample records.
Marine surveying at port of Newcastle
Dock Harbour Authority
Dock and Harbour Authority ; 38 , n 447
1958
4 pages
Article (Journal)
English
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