Hover or tap underlined Spanish terms to see their translation and exam tip.
El Horario en Greenwich se determina a partir del horario del lugar, mediante:Greenwich Hour Angle (GHA) is determined from Local Hour Angle (LHA) by means of:
Show the answer
Correct answer: c) Adding (or subtracting) the Longitude.
Why it is correct
Greenwich Hour Angle (GHA / HG) and Local Hour Angle (LHA / HL) are linked by the observer’s longitude: GHA = LHA + Longitude (adding West longitude and subtracting East longitude).
Why the others are not
- a) Equatorial arcs are added or subtracted, never multiplied.
- b) It is not obtained by division.
- d) They only have the same value when the observer lies on the Greenwich meridian (L = 0°).
How to work it out in the exam
- Relation between GHA and LHA: GHA = LHA ± Longitude.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de diciembre · CY Test 1 · question 1 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de diciembre · CY Test 3 · question 6 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.