A.speed of the vessel over the ground or through the water
B.distance to the next port
C.time of the next navigational satellite pass
D.None of the above
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A.radar scanning
B.radar plotting
C.compass bearings
D.All of the above
A.the shore is bluff and rocky
B.of offshore exposed rocks
C.submerged reefs cause prominent breakers
D.the lookout tower is marked with radar reflectors
A.a few centimeters
B.a few fathoms
C.a few meters
D.a few feet
A.gain control
B.sensitivity time control
C.fast time constant
D.pulse length control
A.sensitivity time control (sea clutter control)
B.receiver gain control
C.brilliance control
D.fast time constant (differentiator)
最新試題
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? （）
When navigating in thick fog with the radar on，you should（）.
Which general statement concerning radar is FALSE?（）.
PPI is（）.
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? （）
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.
When you turn on the fast time constant (differentiator) control of a radar it will（）.
When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）
Which statement about an estimated position is TRUE?（）