通过查看数码相机拍摄照片的（）信息，可以对其原始性进行校验。 A: CFIX B: EXIF C: BXIF D: FIXF

A position that is obtained by applying estimated current and wind to your vessel’s course and speed is a(n) （）. A: Aestimated position B: Bdead reckoning position C: Cfix D: DNone of the above