Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?

Question

Your radar has a beam width of 2&deg;. The radar gyro bearing of the right tangent of an island is 316&deg;. The gyro error is 1&deg;E. Which true bearing should be plotted on the chart?

Accepted Answer

Option C: 316&deg;. Radar beam width distortion affects radar target edges. When taking bearings of a shoreline or island tangent using a PPI scope, the beam width error applies exclusively to the inner tangent. The right tangent requires no beam width correction per Bowditch.

Your radar has a beam width of 2&deg;. The radar gyro bearing of the right tangent of an island is 316&deg;. The gyro error is 1&deg;E. Which true bearing should be plotted on the chart?

Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?