You have determined the maneuvering...

Question 1 / 2066636ee728f7522a1c51797e

Question 1 of 2066636ee728f7522a1c51797e

You have determined the maneuvering characteristics of your vessel by taking the radar ranges and bearings of an isolated light while making a turn. The results are shown in illustration D035DG below. What is the transfer for a turn of 180°?

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🔍 Key Concepts

• Plot each radar observation by converting the bearing from the ship to the light into the reciprocal bearing from the light to the ship, then applying the given range. • Remember that transfer is the distance a vessel moves perpendicular to her original course line after she has changed heading by a specified number of degrees (here, 180°). • Identify where in the table the ship’s heading has changed 180° from the initial 333° and, if needed, use interpolation between the two closest headings to estimate that position.

💭 Think About

• How do you construct the ship’s track from this table of headings, bearings, and ranges so that you can see the turn on paper? • Once you know the point on the track where the heading change is 180°, how can you draw a perpendicular to the initial course line and use the range scale to read the transfer in yards? • Which pair of consecutive data points bracket the 180° heading change, and how can you proportion the distance between them based on the heading difference?

✅ Before You Answer

• Be sure you are measuring perpendicular distance from the initial course line, not along the track of the ship. • Confirm you are using the reciprocal (bearing from the light to the ship) when plotting positions; using the wrong direction will give the wrong track. • Verify that the heading used for the 180° point is exactly 180° different from 333° (i.e., 153°) and that any interpolation between 157° and 196° is done in correct proportion.

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Question 1 of 20

745 yards

770 yards

850 yards

890 yards

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Question 1 / 2066636ee728f7522a1c51797e

Question 1 of 2066636ee728f7522a1c51797e

Back

Question 1 of 20

66636ee728f7522a1c51797e

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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