At 1018 your position is LAT 41°14.4'N, LONG...

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Question 1 of 2066636eea28f7522a1c51a9f5

At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?

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Question 1 of 20

66636eea28f7522a1c51a9f5

At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?

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🔍 Key Concepts

• Plotting two positions on a Mercator chart and measuring the true course made good (CMG) between them • Using differences in latitude and longitude to find course and distance • Converting time difference in minutes to hours and applying the speed formula:
( \text{Speed} = \frac{\text{Distance}}{\text{Time}} )

💭 Think About

• From the first and second positions, which direction (general compass quadrant) did the vessel move in: NW, NE, SE, or SW? Eliminate options that don’t match that general direction • Compute the time run between 1018 and 1036 in minutes, convert to hours, and think about whether a speed in the low 20‑knot range is reasonable for the distance between those lat/longs • Consider how much the latitude changed versus how much the longitude changed—does that suggest a course closer to west, southwest, or another direction?

✅ Before You Answer

• Confirm the time interval between fixes in hours (not just minutes) before using the speed formula • Make sure you use latitude scale on the side of the chart (or 1 NM per minute of latitude) to find distance, not the longitude scale • Verify that the true course you measure (or estimate from ΔLat and ΔLong) falls in the same general direction as the answer choice you are considering

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Question 1 of 2066636eea28f7522a1c51a9f5

At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?

Back

Question 1 of 20

66636eea28f7522a1c51a9f5

At 1018 your position is LAT 41°14.4'N, LONG 72°07.2'W. At 1036 your vessels position is LAT 41°13.1'N, LONG 72°16.1'W. What was your true course and speed made good?

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

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