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- Q134 - Navigation Problems: Near Coastal
372. You swung ship and compared the magnetic compass against the gyrocompass to find deviation. Gyro error is 2°E. The variation is 8°W. Find the deviation on a magnetic compass heading of 234°.
PSC PGC
030.5° 020°
061.5° 050°
092.0° 080°
122.5° 110°
152.0° 140°
181.0° 170°
210.0° 200°
239.5° 230°
269.0° 260°
298.0° 290°
327.5° 320°
358.5° 350°
The deviation at a magnetic compass heading of 234 is 0.5E. This was determined by interpolating between deviation values from the provided table, considering the gyro error and variation.
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