单项选择题

Sailing directions are kept up to date by （）.

A.publications
B.notices to mariners
C.supplements
D.Annual Summary of Admiralty Notices to Mariners

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单项选择题Place names used on board ships should be those （）.

A.specified by international authorities
B.specified by national authorities
C.on standard map
D.on the chart or Sailing Directions in use

单项选择题While steaming slowly in the harbor，no ship is （） to exceed the speed limited．

A.assumed
B.appreciated
C.promised
D.permitted