单项选择题
A.Tidal Current Tables B.Tide Tables C.American Practical Navigator D.Sailing Directions
（）amplify charted detail and contain information needed...
单项选择题（）amplify charted detail and contain information needed for safe navigation.
A.Admiralty Sailing Directions B.Admiralty List of Lights C.Admiralty List of Signals D.Admiralty Notices to Mariners
Admiralty Sailing Directions are Kept up to date by （）....
单项选择题Admiralty Sailing Directions are Kept up to date by （）.
A.corrections B.publications C.supplements D.alterations
Every new supplement to the Sailing Directions （） the p...
单项选择题Every new supplement to the Sailing Directions （） the previous one．
A.enforces B.cancels C.corrects D.replenishes
