Yourbestsail · βίντεο

Τι καλύπτει αυτό το βίντεο

Celestial navigation relies on the method of intercept lines to determine a vessel's position by calculating the difference between an estimated altitude and the true altitude of a celestial body.0:04 Navigators use a sextant to measure the true altitude above the horizon and a nautical almanac to determine the body's coordinates.0:22 By assuming an estimated position, a navigator calculates the expected altitude and azimuth using spherical trigonometry.3:42 The difference between the true and estimated altitude provides the distance to move from the estimated position to the line of position.3:30 Intersecting two such lines from different celestial bodies fixes the vessel's location.7:00 The derivation of these formulas involves the spherical law of cosines and the law of sines, which relate the sides and angles of a spherical triangle.11:52 While Spanish nautical almanacs often require electronic calculators to solve these equations, British tables utilize logarithms to perform the same calculations manually, maintaining independence from electronic systems.59:45 Understanding the mathematical derivation of these formulas clarifies the underlying principles of celestial navigation.

Περισσότερα από το Yourbestsail

The genoa sheet car (Again!)Σεπ 2026The function of the centerboardΑυγ 2026Marinas and Yacht Clubs: ProceduresΑυγ 2026The 10 most common mistakes when docking a boatΙουν 2026

Από Yourbestsail — δείτε το σκάφος του καναλιού, το πλήρωμα και κάθε αναλυμένο βίντεο.

The Sailing Directory Newsletter

Ένα email με τις καλύτερες ανακαλύψεις του στόλου — τις στιγμές, τα σκάφη και τις ιστορίες που αξίζουν τον χρόνο παρακολούθησής σας. Εισάγετε τη διεύθυνσή σας για να λάβετε το δικό σας αντίγραφο.