单项选择题
Admiralty Notices to Mariners，containing important information for the mariners and enabling them to keep their charts and books corrected for the latest information，are issued daily and published in（）.
A.Weekly Editions B.Quarterly Editions C.Annual Editions D.Monthly Editions
单项选择题 Admiralty Notices to Mariners are published （）.
单项选择题 A storm is forecast for the area where your vessel is moored. For its safety you should put （）.
单项选择题 A steep barometric gradient indicates （）.
