A. Many ships have two derricks at each hatch. B. Many ships have two winches at each hatch. C. Many ships have two derricks and two winches at each hatch. D. Many ships have two derricks and two winches at each hatch cover.
A. Heavy derrick is used for lifting large heavy cargo. B. Derrick is used for lifting large heavy cargo. C. Heavy derrick is used for lifting dry bulk cargo. D. Derrick is used for lifting dry bulk cargo.
A. The ship needs loading. B. The ship needs discharging. C. The ship needs unloading. D. The ship needs loading and discharging.