Two beacons form a range in the direction of...

Question 1 of 2707066636eea28f7522a1c51b709

Two beacons form a range in the direction of 221.5°T. The range is seen in line from your vessel bearing 223° per gyrocompass. The variation in the area is 4°E. What is the error of your gyrocompass?

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Question 1 of 27070

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🔍 Key Concepts

• Gyro error is the difference between the gyro bearing and the true bearing, expressed as E or W • Relationship of variation (V) between true (T) and magnetic (M): "True ± Variation = Magnetic" • Understand that the range line gives you the true bearing of the object when you are in line with it

💭 Think About

• Which value in the question represents the true bearing, and which represents the gyro bearing? • Once you have gyro and true bearings, how do you find gyro error, and how do you decide if it is east or west? • Is variation used directly to find gyro error here, or is it just a distraction? Think carefully.

✅ Before You Answer

• Identify clearly: True bearing of the range vs gyro bearing observed • Compute gyro error = True – Gyro (or Gyro – True), then interpret the sign as E or W • Double‑check whether variation actually changes the bearings you are comparing in this specific setup