You are swinging ship to calibrate the RDF. The RDF gyro bearing is 054° at the same time the visual bearing is 055°pgc. The gyro error is 1°E. At the time of the bearings, the heading was 139°pgc. Which statement about the calibration is TRUE?

A
One degree must be added to all RDF bearings.
B
One degree must be subtracted from an RDF bearing of 055°T.
C
One degree must be added to all RDF bearings of 276° relative.
D
One degree must be subtracted from RDF bearings when on a course of 140°T.
E