A、a part of B、the whole C、3/4th of D、1/2nd of
A、six consecutive starts B、eight consecutive starts C、ten consecutive starts D、twelve consecutive starts
A、A. We dismantle the jumbo boom twice a voyage. B、B. We dismantle the derricks once a voyage. C、C. We examine the derricks once a voyage. D、D. We dismantle the heavy derricks once a voyage.
A、engine room logbook B、voyage logbook C、engine room logbook or voyage logbook D、engine room logbook and voyage logbook