At 1718, Bartlett Reef Light bears 050°T at...

Study

Question 1 of 2066636eea28f7522a1c51ab66

At 1718, Bartlett Reef Light bears 050°T at a distance of 1.5 miles. From this position, you change course to 128°T. At 1750 Race Rock Light bears 336°T, Little Gull Island Light bears 285°T, and Montauk Point Light bears 134°T. What were the set and drift of the current you encountered since 1718?

Back

Question 1 of 20

66636eea28f7522a1c51ab66

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Running fix and triangulation using multiple bearings to known lights • Difference between dead reckoning (DR) position and fix position to determine current set and drift • Using time difference and distance between DR and fix to compute drift speed (knots) and set (direction)

💭 Think About

• From the 1718 position, where would your DR position be at 1750 if there were no current, assuming your course and speed are steady? • How do you use the three simultaneous bearings at 1750 to plot an accurate fix, and how does that fix compare to your DR position? • Once you have DR and fix plotted, which way did the current push you, and how far in 32 minutes did it move you?

✅ Before You Answer

• Be sure the 1750 position is a true fix from three crossing lines of position (LOPs), not just one bearing • Carefully measure the distance and direction from DR to fix; the arrow should point FROM DR TO FIX for current set • Convert the distance between DR and fix to knots using time 1718–1750 (32 minutes) with the formula ( \text{Speed (knots)} = \frac{\text{Distance (NM)}}{\text{Time (hours)}} )

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

Quick actions

— No credit card needed