Hydrographical surveying : a description of means and methods employed in constructing marine charts (1920)
Wharton, W. J. L. (William James Lloyd), 1843-1905, Field, Arthur Mostyn, 1855- · London : J. Murray · leaf 159
rial bearings of 0 138 HYDROGRAPHICAL SURVEYING [fHAP. v. from G and W, and the diff. lat., from which we can obtainthe distances G 0, O W, and thence the mercatorial bearingand distance G W. Example V.—Tivo inaccessible peaks visible from three posi-tions, the intermediate position being visible… … D C H is an intermediate station visible from A and C. B and D are two inaccessible peaks visible from A, H and C. Angles are observed at A, H and C. True bearings and latitudes at A and C. In A A B H, B H = A H . sin B A H . cosec A B HIn A C B H, B H = H C . sin B C H . cosec H B C AH sin B C H .…
Hydrographic surveying · Nautical charts
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