A.be more suitable for river and harbor navigation
B.provide better range performance on low lying targets during good weather and calm seas
C.have a wider horizontal beam width
D.have more sea return during rough sea conditions
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A.sweep introduction
B.sweep interest
C.sweep intention
D.sweep intensity
A.all fishing vessels over 39 feet in length
B.sail-propelled fishing vessels
C.all fishing vessels of less than 200 GT
D.wooden hull fishing vessels with a poor radar echo
A.in dense fog
B.in boisterous weather
C.in the open sea
D.in rivers
A.incorrect image
B.distinctive image
C.pictorial image
D.pictographic image
A.with
B.to
C.for
D.of
最新試題
Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.
（）is not used in modern radar.
What provides little or no indication that a vessel is dragging anchor? （）
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
Which procedure(s) shall be used to determine risk of collision? （）
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? （）
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? （）
Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel? （）