At 2221 your course is 222°pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355° relative, at a range of 5.8 miles. The gyro error is 2°E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port?

Question

At 2221 your course is 222&deg;pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355&deg; relative, at a range of 5.8 miles. The gyro error is 2&deg;E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port?

Accepted Answer

Option B: 228&deg;pgc. Convert the relative bearing to a true bearing by applying the gyro error. Determine the vessel's position at 2226 via dead reckoning. Using the relative motion triangle method, solve for the course to steer that results in a 1.0-mile CPA to port. The resulting course is 228°pgc.

At 2221 your course is 222&deg;pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355&deg; relative, at a range of 5.8 miles. The gyro error is 2&deg;E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port?

At 2221 your course is 222°pgc at a speed of 11.2 knots, when radar detects a buoy bearing 355° relative, at a range of 5.8 miles. The gyro error is 2°E. If you change course at 2226, what course should you steer to leave the buoy 1.0 mile abeam to port?