A.corrections
B.publications
C.supplements
D.alterations
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A.enforces
B.cancels
C.corrects
D.replenishes
A.horizontal
B.vertical
C.diagonal
D.vertical or diagonal
A.publications
B.notices to mariners
C.supplements
D.Annual Summary of Admiralty Notices to Mariners
A.specified by international authorities
B.specified by national authorities
C.on standard map
D.on the chart or Sailing Directions in use
A.assumed
B.appreciated
C.promised
D.permitted
最新試題
Attention is called to the fact that in many cases pipelines are not （） and charted depths may be decreased by up to 2 meters．
As these features are not all charted，special caution should be exercised （） vessels navigating in the vicinity.
Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? （）
Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.
AFTER DROPPING THE PILOT means （）.
On a voyage from Capetown to London，the favorable ocean current off the coast of Africa is the （）.
A vessel not to impede the passage of another vessel is not relieved （） taking collision-avoiding action.
Conditions for crossing a rough bar are usually best at （）.
In Admiralty Sailing Directions，bands is the word used to indicate（）marking．