Leon Schulz, Reginasailing · βίντεο

Τι καλύπτει αυτό το βίντεο

Celestial navigation requires comparing an observed altitude (Ho) of the sun, measured with a sextant, against a pre-calculated altitude (Hc) derived from sight reduction tables.1:20 To perform this calculation, a navigator must determine the sun’s declination and Greenwich Hour Angle (GHA) using an astronomical almanac and a precise clock.4:11 Because sight reduction tables are printed for full degrees of latitude and Local Hour Angle (LHA), the navigator selects an "assumed position" near their estimated location that satisfies these whole-degree requirements.9:51 The difference between the observed and calculated altitudes provides the "intercept," a distance in nautical miles that defines a position line relative to the assumed position.13:55 By plotting two such lines—often taken at different times and adjusted for the vessel's movement—a navigator establishes a fix.17:03 While manual calculation using almanacs and tables is standard, digital apps can also generate the required Hc and azimuth values.21:05

Σκάφη σε αυτό το βίντεο

Περισσότερα από το Leon Schulz, Reginasailing

John Neal and Leon Schulz on Regina Laska in the Azores.Αυγ 2026Engine Room SafetyΙουν 2026Stuck Trudesign Valves during MCA Inspection and solutionΜαΐ 2026IMRAY or Reeds Almanac?Απρ 2026

Από Leon Schulz, Reginasailing — 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.