Hover or tap underlined Spanish terms to see their translation and exam tip.
Calcular el rumbo inicial (Ri) Ortodrómico desde un punto A de coordenadas l=43º23’S y L=147º42’E, a un punto B de coordenadas l=56º00’S y L=67º13’W.Calculate the initial Great Circle course from point A at l=43º23’S and L=147º42’E to point B at l=56º00’S and L=67º13’W.
Show the answer
Correct answer: b) Ri: 160.8º
Why it is correct
In the Southern Hemisphere the great circle dips towards the pole: initial course 160.8º.
Why the others are not
- a) It does not match the working.
- c) It does not match the working.
- d) It does not match the working.
How to work it out in the exam
- tan R = sin ΔL / (cos l1 tan l2 − sin l1 cos ΔL).
- Convert the result to circular by the direction of travel.
Where this question comes from
- Región de Murcia · 2026 · 2ª convocatoria · CY Tipo 1 · question 18 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.