Your vessel is on course 180°T speed 22...

Question 1 / 2066636ee928f7522a1c51a5af

Question 1 of 2066636ee928f7522a1c51a5af

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?

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Question 1 of 20

66636ee928f7522a1c51a5af

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?

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🔍 Key Concepts

• Relative (apparent) vs. true wind vectors – how the vessel’s motion changes what you feel on deck • Ship’s course and speed as a vector (180°T at 22 knots) and apparent wind as another vector (70° off the port bow at 20 knots) • Using vector addition/subtraction (head-to-tail triangle or right-angle components) to find the true wind direction and speed

💭 Think About

• Sketch the ship’s course as a vector pointing due south (180°T) and then sketch the apparent wind 70° off the port bow; think carefully about which quadrant that apparent wind lies in, relative to true north • Remember that apparent wind is the result of true wind and ship’s motion combined; decide whether you should add or subtract the ship’s velocity vector to recover the true wind • Break the vectors into north–south and east–west components using sine and cosine, then recombine to get the magnitude (speed) and angle (direction) of the true wind

✅ Before You Answer

• Be clear which way is port bow when you’re headed 180°T, and convert “70° off the bow” into a true bearing before you do any trig • Check that your component signs (north/south, east/west) are consistent with the sketch of the situation • After you compute the true wind, confirm that its direction and speed are reasonable: does the resulting true wind, combined with ship’s motion, produce an apparent wind from 70° off the port bow at 20 knots?

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Question 1 of 20

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?

45°T, 21.0 knots

51°T, 24.0 knots

58°T, 21.2 knots

64°T, 26.0 knots

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Question 1 / 2066636ee928f7522a1c51a5af

Question 1 of 2066636ee928f7522a1c51a5af

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?

Back

Question 1 of 20

66636ee928f7522a1c51a5af

Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. What are the true direction and speed of the wind?

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?

Quick actions

— No credit card needed