At 1042 you take the following round of...

At 1042 you take the following round of...

Question 1 of 29218fork_433b2c114f6e42258f8

At 1042 you take the following round of bearings: Cape Henry Light 259°T Chesapeake Light 101°T Cape Charles Light 006°T From this position, you set course 070°T at a speed of 9.5 knots. What is the course per standard magnetic compass?

Question 1 of 29218

Q

At 1042 you take the following round of bearings: Cape Henry Light 259°T Chesapeake Light 101°T Cape Charles Light 006°T From this position, you set course 070°T at a speed of 9.5 knots. What is the course per standard magnetic compass?

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🔍 Key Concepts

• Converting true to compass courses using variation and deviation • Understanding what a "per standard magnetic compass (psc)" course means • How local variation and deviation from the deviation table are applied

💭 Think About

• From a plotted true course of 070°T, what steps do you take to arrive at a standard magnetic compass course? • In which order do you apply variation and deviation when going from true to compass? • How do you decide whether to add or subtract variation and deviation based on whether they are east or west?

✅ Before You Answer

• Confirm the local magnetic variation in the Cape Henry / Chesapeake Light area for the chart in use and its annual change • Check the vessel’s deviation card for the heading closest to 070° and determine whether deviation is E or W and by how many degrees • Verify that you applied the correct sign convention (east is least, west is best) when converting from true to compass