Hover or tap underlined Spanish terms to see their translation and exam tip.
Para asegurarnos de una buena conservación del sextante, los movimientos de la alidada cuando se estén tomando alturas se realizarán:To ensure proper care of the sextant, movements of the index arm (alidada) while taking sights should be made:
Show the answer
Correct answer: a) Gently, and only after making sure that its clamping mechanism is fully released.
Why it is correct
To avoid damaging the precision teeth of the arc rack and micrometer worm gear, always press the quick-release latch fully (or release the clamp screw) before sliding the index arm, and move it smoothly and gently.
Why the others are not
- b) Sharp jerks damage the arc, and the index mirror is mounted rigidly to the index arm, never loosened.
- c) The index mirror is never loosened to move the arm; it is the index-arm clamp/latch on the arc that is released.
- d) The horizon glass is fixed to the frame and does not rotate with the index arm.
How to work it out in the exam
- Moving the sextant index arm: always smoothly and only after fully releasing its clamp/latch on the arc.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2022 · Convocatoria de junio · CY Test 1 · question 6 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2022 · Convocatoria de junio · CY Test 2 · question 5 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.