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
A、Admiralty Notices to Mariners
B、Mariner's Handbook
C、Catalogue
D、Sailing Directions
A、gangs employed B、windlass trouble C、gangs unavailable D、shortage of navigational charts