（）is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since，using for this purpose the ship’s course and the distance being those indicated by log.<br>A:dead reckoning<br>B:dead weight<br>C:dead slow ahead<br>D:dead slow astern

（）is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since，using for this purpose the ship’s course and the distance being those indicated by log.
A:dead reckoning
B:dead weight
C:dead slow ahead
D:dead slow astern

出自：海船船员证

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