Hover or tap underlined Spanish terms to see their translation and exam tip.
El 26 de noviembre del 2021 obtenemos una altura instrumental limbo inferior del sol de 36º25.4´ La elevación de nuestro observador es de 10m, disponemos de una corrección de índice de 1 (-). Queremos hallar la altura verdadera.On 26 November 2021 we obtain a lower-limb Sun sextant altitude of 36º 25.4' with height of eye 10 m and index correction 1' (-). Find the true altitude.
Show the answer
Correct answer: b) 36º 33.8'
Why it is correct
With ai = 36º 25.4′, subtract Ci = −1.0′ (ao = 36º 24.4′) and dip for 10 m (−5.6′ → aap = 36º 18.8′). Adding the November lower-limb Sun correction at 36º (+15.0′) gives av = 36º 33.8′.
Why the others are not
- a) Subtracts nearly 2 degrees from the sextant altitude.
- c) Drops 1 full degree when adding the minutes.
- d) Implausible value caused by a decimal point error.
How to work it out in the exam
- −1.0′ (Ci) − 5.6′ (dip 10 m) + 15.0′ (Sun) = +8.4′ → 36º 33.8′.
Where this question comes from
- Junta de Andalucía · 2021 · 1ª convocatoria · CY Módulo de navegación · question 13 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.