At 0620, you reduce speed to 10 knots and,...

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Question 1 of 2066636eea28f7522a1c51a879

At 0620, you reduce speed to 10 knots and, at 0720, change course to 252°pgc when you are 0.3nm due North (000°T) of Y”NCA”. If set and drift is 210°T @ 1.2kts and you do not adjust your heading, which of the following is TRUE?

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Question 1 of 20

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🔍 Key Concepts

• Set and drift and how they affect a planned track over time • Plotting a course change from a known position relative to a buoy (0.3 nm due North of Y"NCA") • Understanding the layout and orientation of the traffic separation scheme and Precautionary Area in the charted area

💭 Think About

• From 0620 to 0720 at 10 knots, how far do you travel through the water, and where would that put you relative to Y"NCA" if there were no current? • How far will the current (210°T @ 1.2 kts) move you sideways and along-track during that same hour, and in what direction relative to the traffic lanes? • Once you alter course to 252° pgc and then continue without further adjustment, will the combined effect of your heading and the set put you into, before, or beyond specific parts of the traffic separation zone?

✅ Before You Answer

• Compute and plot the DR position (dead-reckoned) from 0620–0720 at 10 kts, ignoring current first • Then apply the current vector (210°T @ 1.2 kts for 1 hour) from your DR position to find your estimated position (EP) at 0720 • On the chart, track ahead from 0720 on 252° pgc with the same set and drift to see where your track crosses the limits of the traffic separation zone and the Precautionary Area

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