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 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（）.
Which statement is true concerning a vessel equipped with operational radar?（）.
Which condition indicates that your radar needs maintenance?（）
PPI is（）.
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
Although manual plotting for CPA works well，the workload can become overwhelming when confronted with（）.
（）is not a job of the radar antenna.
When using an ARPA，what should you consider in order to evaluate the information displayed?（）
You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must（）.
When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）