da Autore | Mag 27, 2026 | Astronomy, Mathematics, Navigation
Sight reduction with matrix algebra and least squares Sight Reduction with Matrices — R. Watkins & P. M. Janiczek (1978) 1. Description The Watkins & Janiczek method is a technique for computing the astronomical fix from any number of lines of position,...
da Autore | Apr 20, 2026 | Mathematics, Navigation
The direct two-sight fix 1. Description of the method Gery’s method — presented in 1997 by Stanley W. Gery in the NAVIGATION journal of the Institute of Navigation — is a sight-reduction procedure that delivers the ship’s position (fix) directly in closed...
da Autore | Apr 16, 2026 | Mathematics, Navigation
The two-sight fix 1. Description of the method The Van Allen Method — sometimes referred to in the literature as “Direct Sight Reduction” or “two-sight analytical method” — yields the ship’s position (fix) directly from two true altitudes...
da Autore | Feb 6, 2019 | Mathematics
Trigonometry as taught in schools and school books is mostly “analytical ” and takes years to master. For seamen, this is generally impossible. What they chiefly want is that part of the science dealing with the practical solution of triangles...
