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 Mariner’s Handbook （）general information affecting navigation and is complementary to the Sailing Directions．
Right ascension is primarily used by the navigator for（）.
Most Navigation System equipment is（）from the bridge, a unique location that allows for a centralized,safe and efficient management of ship navigation.
The Navigation Rules state that a vessel shall be operated at a safe speed at all times so that she can be stopped within（）.
In the navigational triangle，the angle at the elevated pole is the（）.
When ship navigating in rough sea, the correct operation is （）
Which statement concerning the navigation of a vessel in ice is FALSE?（）
If at any time the officer in charge of the navigational watch is to be relieved when a manoeuvre or other action to avoid any hazard is taking place,（）.
（）is the offense against navigational rules and will make the ship unseaworthy with the Shipowner responsible for all the consequences.
In particular,which is not included in the Navigation System?（）
The WWNWS is a coordinated global service for the broadcast by radio of vital information on（）to marine navigation.
Which statement about the Navigation Rules is TRUE?（）.
A section of the river that is narrower than usual and is often navigable from bank to bank is a（）.
The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）
A Coast Guard radiotelephone message about an aid to navigation that is off station is preceded by the word（）.
If several fixed navigational lights are visible at the same time，each one may be positively identified by checking all of the following EXCEPT what against the Light List?（）
Christopher Columbus is a famous Italian navigator and the pioneer of the great voyages of discovery.
After Ming Dynasty, the government adopted the closed door policy, at the same time, with the continuous development of shipbuilding and navigation technology, maritime traffic caused the Silk Road trade to decline.
144. The only cylinder chart projection widely used for navigation is the ____
83. The only cylindrical chart projection widely used for navigation is the _____.
35. When you navigate pipelines, which of the following garbage is always prohibited to be disposed into the sea
The Chief Officer is in charge of the standard____navigation watch duty（）
