You sight Thimble Shoal Light in line with...

You sight Thimble Shoal Light in line with...

Question 1 of 31048fork_e39cb8456aa049f09dd

You sight Thimble Shoal Light in line with Old Point Comfort Light bearing 265° per standard magnetic compass. You are on course 135°psc. Based on this information which of the following is true?

Question 1 of 31048

Q

You sight Thimble Shoal Light in line with Old Point Comfort Light bearing 265° per standard magnetic compass. You are on course 135°psc. Based on this information which of the following is true?

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🔍 Key Concepts

• Compass error = variation + deviation (E or W) • Difference between a charted bearing and a compass bearing • Meaning of "per standard magnetic compass" and what that implies about deviation

💭 Think About

• Think about what information you actually have: Do you know the true or magnetic bearing between Thimble Shoal Light and Old Point Comfort Light from the chart? How does that compare to 265°psc? • If the standard compass is properly adjusted, what should its deviation be? How is that different from variation? • Which of the choices are about a known, proven condition versus something you would only suspect and therefore need to verify?

✅ Before You Answer

• Check how a standard magnetic compass is normally treated regarding deviation (ideally what value?). • Verify whether one single observation is enough to prove no compass error or local magnetic disturbance. • Consider whether the information given lets you separate variation from deviation, or only tells you about one of them.