Expert-Level Sea Route Mastery Quiz
A demanding set of multiple‑choice items probing deep knowledge of navigation techniques, calculations, and safety protocols for professional seafarers.
Quiz Questions
Answer all questions below and test your knowledge.
- 1
In a Mercator sailing triangle, which side corresponds to the latitude difference between departure and destination?
- 2
When applying the Haversine formula for great‑circle distance, what unit must the angular differences be expressed in?
- 3
For a vessel navigating using the Star of Bethlehem (Polaris) at a latitude of 45°N, what is the true altitude of the star above the horizon?
- 4
Which correction is applied to a magnetic compass reading to obtain a magnetic bearing when the deviation table shows -2° and the variation is +12°?
- 5
During dead reckoning, a ship travels 180 nautical miles east on a course of 090° at 12 knots for 15 hours. What is the estimated position change in latitude?
- 6
What is the standard pressure at sea level used in the International Barometric Formula for altitude correction?
- 7
A tide chart shows a semi‑diurnal pattern with a mean range of 2.4 m. If high tide occurs at 04:15 UTC, when is the next high tide expected?
- 8
When using an Electronic Chart Display and Information System (ECDIS), which layer must be activated to display depth contours for safe grounding avoidance?
- 9
In pilotage, what is the term for the angular measurement taken between two fixed points on shore to establish a line of position?
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