Spanish original · English

Hover or tap underlined Spanish terms to see their translation and exam tip.

En la mar, durante el crepúsculo vespertino, con el sextante obtenemos la altura de un astro. Tras aplicar las pertinentes correcciones, obtenemos:At sea, during evening twilight, we take a body’s altitude with the sextant. After applying the corrections, we obtain:

Show the answer

Correct answer: a) The angle of the arc of the body’s vertical circle, counted from the astronomical horizon to the almucantar.

Why it is correct

True altitude is measured along the vertical circle, from the horizon up to the body.

Why the others are not

  • b) That resembles the sidereal hour angle.
  • c) That is declination.
  • d) That is right ascension.

How to work it out in the exam

  1. Altitude: vertical circle and horizon. Declination: hour circle and equator.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.