You are steaming on a course of 198°T at...

Question 1 / 2066636ee928f7522a1c51a1a4

Question 1 of 2066636ee928f7522a1c51a1a4

You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?

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Question 1 of 20

66636ee928f7522a1c51a1a4

You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?

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🔍 Key Concepts

• Relative motion of a fixed object when you are on a straight course and constant speed • Using the time between two bearings and ship’s speed to find distance run • The relationship between the change in the lighthouse’s bearing and your distance off at the second bearing

💭 Think About

• Draw a clear sketch of your track and the two bearings from the lighthouse. Where is the right angle in this geometry? • Convert the time between 0316 and 0348 to hours and use your speed to find how many miles you traveled between the two bearings. How does that segment relate to the distance off at the second bearing? • Look at the angular difference between 235°T and 259°T. How does the sine of this angle help you relate the distance run to the distance off?

✅ Before You Answer

• Confirm you correctly converted the 32 minutes between bearings into hours before multiplying by 18.5 knots • Make sure you are using the difference between the bearings, not the course, when applying trigonometric relationships • Verify that your final distance off is less than the distance you traveled between the two bearings (sense‑check the geometry of your sketch)

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Question 1 of 20

You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?

16.3 miles

15.8 miles

14.8 miles

15.3 miles

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Question 1 / 2066636ee928f7522a1c51a1a4

Question 1 of 2066636ee928f7522a1c51a1a4

You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?

Back

Question 1 of 20

66636ee928f7522a1c51a1a4

You are steaming on a course of 198°T at 18.5 knots. At 0316 you observe a lighthouse bearing 235°T. At 0348 the lighthouse bears 259°T. What is your distance off at the second bearing?

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