单项选择题
All charts and publications should be kept up to date with the（）amendments
A.latest B.update C.last D.up-to-date
单项选择题 In particular,which is not included in the Navigation System?（）
单项选择题 The VDR system is designed to operate（）once it is set up correctly.There is no user interaction.
单项选择题 Information from the stations and installations shall be appropriatelysharedby（）.
