取消预定船位包括全部或部分船位取消、变更船名或航期。
"Cancellation" includes the cancellation of all or part of the beds, the change of the cruiser or the departure time.
海图和航海出版物，用于计划和显示船舶预定航程的航线以及监测整个航程的船位。
4 nautical charts and nautical publications to plan and display the ship's route for the intended voyage and to plot and monitor positions throughout the voyage.
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