单选题Changes in direction or speed of the main propulsion units shall be recorded, （）an Administration has determined that the size or characteristics of a particular ship make such recording impracticable.Ain addition toBin addition thatCexcept forDexcept where
单选题
Changes in direction or speed of the main propulsion units shall be recorded, （）an Administration has determined that the size or characteristics of a particular ship make such recording impracticable.
A
in addition to
B
in addition that
C
except for
D
except where
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