The issue of Notices to Mariners of charts and these aids(Ra

Navigational charts are subject to frequent changes，the important ones of which are promulgated by ________ ．

A.Admiralty Notices to Mariners

B.Mariner's Handbook

C.Catalogue

D.Sailing Directions

The charts sold are of ______.

A.newly edition with up to date correction and in reasonable prices

B.the current edition and incorporate the last Notices to Mariners correction

C.the current edition and incorporate the latest Notices to Mariners correction at the time of sale

D.brand-new one with up to date correction and clean writing

Sailing directions are kept up to date by ______.

A.publicatons

B.notices to mariners

C.supplements

D.Annual Summary of Adiralty Notices to Mariners

Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of ______.

A.marine broadcast Notice to Mariners

B.Weekly Notices to Mariners

C.corrected editions of charts

D.Light Lists

Admiralty Notices to Mariners are published ______.

A.every day

B.every week

C.every month

D.every year

Navigational charts are ______ frequent changes，the important one of which are promulgated by Admiralty Notices to Mariners．

A.published with

B.combined with

C.in connection with

D.subject to

Charts are subject to frequent correction according to ______.

A.Notices to Mariners

B.Mariner's handbook

C.Sailing Directions

D.Guide to Port Entry

________ are published for correction of Admiralty Charts．

A.Admiralty Sailing Directions

B.Admiralty List of Signals

C.Mariner's Handbook

D.Admiralty Notices to Mariners

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

The issue of Notices to Mariners of charts and these aids(Radar beacons)may be delayed until such time as they are assessed to be ______.

A.temporary

B.permanent

C.occasional

D.steady