If your asphalt barge has operated more than 12 months in saltwater in the 24 month period since it was last dry-docked,when is it required to be hauled out again? ()
A:12 months since last dry-docking
B:18 months since last dry-docking
C:24 months since last dry-docking
D:36 months since last dry-docking
出自:海船船员证