A.should not be made
B.are not to be taken
C.should be taken
D.shall be made
您可能感興趣的試卷
你可能感興趣的試題
A.used
B.available
C.in use
D.can be used
A.unwanted interference
B.unexpected figures
C.abnormal data
D.unwanted information
最新試題
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
Which procedure(s) shall be used to determine risk of collision? （）
You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）
The（）has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm.
When using an ARPA，what should you consider in order to evaluate the information displayed?（）
You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later，the contact is 8 miles directly astern of you. What is the estimated speed of the contact? （）
Which statement about an estimated position is TRUE?（）
Radar reflectors are required for（）.
When you turn on the fast time constant (differentiator) control of a radar it will（）.
Which condition indicates that your radar needs maintenance?（）