航海英语雷达及ARPA的使用章节练习(2017.12.06)

单项选择题
When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.
A.in the way
B.the way
C.by the way
D.through the path
单项选择题
The shoreline along Rocky Point should give a good radar return because（）.
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
单项选择题
The development of（）led to the fully automatic ARPA systems installed on commercial ships.
A.SeaTalk
B.powerful microprocessors and mega memory capacity
C.chartplotter
D.small-scale chart
单项选择题
Which statement concerning the operation of radar in fog is TRUE?（）
A.Radar ranges are less accurate in fog
B.Navigation buoys will always show up on radar
C.A sandy beach will show up clearer on radar than a rocky cliff
D.Small wooden boats may not show up on radar
单项选择题
Which procedure(s) shall be used to determine risk of collision? （）
A.Watching the compass bearing of an approaching vessel
B.Systematic observation of objects detected by radar
C.Long-range radar scanning
D.All of the above
单项选择题
Which condition indicates that your radar needs maintenance?（）
A.Serrated range rings
B.Indirect echoes
C.Multiple echoes
D.Blind sector
单项选择题
Radar reflectors are required for（）.
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
单项选择题
The radar control used to reduce sea return at close ranges is the（）.
A.gain control
B.sensitivity time control
C.fast time constant
D.pulse length control
单项选择题
Which statement is TRUE concerning a vessel equipped with operational radar?（）.
A.She must use this equipment to obtain early warning of risk of collision
B.The use of a radar excuses a vessel from the need of a look-out
C.The radar equipment is only required to be used in restricted visibility
D.The safe speed of such a vessel will likely be greater than that of vessels without radar
单项选择题
The ARPA may swap targets when automatically tracking if two targets（）.
A.are tracked on reciprocal bearings
B.are tracked at the same range
C.are tracked on the same bearing
D.pass close together

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航海英语雷达及ARPA的使用章节练习(2017.12.06)

When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.

The shoreline along Rocky Point should give a good radar return because（）.

The development of（）led to the fully automatic ARPA systems installed on commercial ships.

Which statement concerning the operation of radar in fog is TRUE?（）

Which procedure(s) shall be used to determine risk of collision? （）

Which condition indicates that your radar needs maintenance?（）

Radar reflectors are required for（）.

The radar control used to reduce sea return at close ranges is the（）.

Which statement is TRUE concerning a vessel equipped with operational radar?（）.

The ARPA may swap targets when automatically tracking if two targets（）.

航海英语雷达及ARPA的使用章节练习(2017.12.06)

When hitting a solid object such as a ship or an airplane，the radar waves are reflected back （）they came.

The shoreline along Rocky Point should give a good radar return because（）.

The development of（）led to the fully automatic ARPA systems installed on commercial ships.

Which statement concerning the operation of radar in fog is TRUE?（）

Which procedure(s) shall be used to determine risk of collision? （）

Which condition indicates that your radar needs maintenance?（）

R﻿adar reflectors are required for（）.

The radar control used to reduce sea return at close ranges is the（）.

Which statement is TRUE concerning a vessel equipped with operational radar?（）.

The ARPA may swap targets when automatically tracking if two targets（）.

Radar reflectors are required for（）.