A.in dense fog
B.in boisterous weather
C.in the open sea
D.in rivers
您可能感興趣的試卷
你可能感興趣的試題
A.incorrect image
B.distinctive image
C.pictorial image
D.pictographic image
A.with
B.to
C.for
D.of
A.should not be made
B.are not to be taken
C.should be taken
D.shall be made
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
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced? （）
Radar reflectors are required for（）.
When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）
Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
PPI is（）.
Which condition indicates that your radar needs maintenance?（）
When you turn on the fast time constant (differentiator) control of a radar it will（）.
（）typically extends from close as 0.1 nautical miles out to 32 NM.
You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.