单项选择题 Maintenance of charts and nautical publications up to date is a statutory requirement under the（）Convention.

单项选择题 You are in charge of a stand-on vessel in a crossing situation.The other vessel is 1.5 miles to port.You believe that risk of collision exists.You should（）.

单项选择题 Instructions for on-board maintenance of each life-saving appliance shall not include（）.