You will find information about the duration of slack water in the （）.

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

单项选择题Admiralty Sailing Directions are Kept up to date by （）.

A.corrections
B.publications
C.supplements
D.alterations

单项选择题Every new supplement to the Sailing Directions （） the previous one．

A.enforces
B.cancels
C.corrects
D.replenishes

单项选择题In Admiralty Sailing Directions，STRIPES is the word used to indicate （）marking.

A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal

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