While on a course of 279° T, a light bears...

Question 1 / 2066636eea28f7522a1c51afeb

Question 1 of 2066636eea28f7522a1c51afeb

While on a course of 279° T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

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Question 1 of 20

66636eea28f7522a1c51afeb

While on a course of 279° T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

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🔍 Key Concepts

• Relative vs true bearing: Convert the 12° on the starboard bow to a true bearing of the light from your ship. • CPA (Closest Point of Approach) geometry: Think of a right triangle where the distance to the light is the hypotenuse and the desired passing distance abeam is one leg. • Course line vs abeam point: The course you choose must create a track line such that the perpendicular distance from the light to that line is 4 miles on your starboard side.

💭 Think About

• First, sketch your present position, your current course of 279° T, and the light’s bearing and distance. Where is the light relative to your track? • Then, draw a desired track line that passes with the light 4 miles to starboard at the closest point. What angle must that track make with the line joining you to the light? • After you find the angle between the line of sight to the light and your proposed course, decide whether you should steer more northerly or more southerly than your present 279° T to keep the light on your starboard side.

✅ Before You Answer

• Convert the relative bearing (12° starboard bow) into a true bearing using your present course of 279° T before doing any triangle work. • Use the correct sides when applying trigonometry: the 9.3 miles is the slant range to the light (hypotenuse), and the 4 miles abeam distance is the perpendicular distance (opposite side in a right triangle). • After finding the new course, confirm that on that heading the light would lie on your starboard side at the closest point, not port.

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Question 1 of 20

While on a course of 279° T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

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Question 1 / 2066636eea28f7522a1c51afeb

Question 1 of 2066636eea28f7522a1c51afeb

While on a course of 279° T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

Back

Question 1 of 20

66636eea28f7522a1c51afeb

While on a course of 279° T, a light bears 12° on the starboard bow at a distance of 9.3 miles. What course should you steer to pass 4 miles abeam of the light leaving it to starboard?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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