Which navigational method is used to determine position using stars?

Prepare for the Boatswain’s Mate Chief (BMC) SWE Exam with in-depth study materials and multiple-choice questions. Enhance your understanding with well-explained hints and explanations. Ready yourself to excel!

Multiple Choice

Which navigational method is used to determine position using stars?

Explanation:
The main concept is celestial navigation. This method fixes your position by observing celestial bodies, especially stars, with a instrument like a sextant to measure their altitude above the horizon. By recording the exact time of the sight and consulting astronomical tables, you can plot a line of position on a chart. Doing this with multiple stars (or the sun) lets you intersect lines and determine your latitude and longitude. Radar, sonar, and a magnetic compass serve different purposes: radar detects nearby objects using radio waves, sonar uses sound in the water, and a compass provides direction relative to magnetic north rather than your exact geographic position.

The main concept is celestial navigation. This method fixes your position by observing celestial bodies, especially stars, with a instrument like a sextant to measure their altitude above the horizon. By recording the exact time of the sight and consulting astronomical tables, you can plot a line of position on a chart. Doing this with multiple stars (or the sun) lets you intersect lines and determine your latitude and longitude.

Radar, sonar, and a magnetic compass serve different purposes: radar detects nearby objects using radio waves, sonar uses sound in the water, and a compass provides direction relative to magnetic north rather than your exact geographic position.

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