單項(xiàng)選擇題

In using Loran-C，skywave reception gives greater range but is（）.

A.only accurate during daylight hours
B.much less accurate
C.only accurate at twilight
D.more accurate than using ground waves

你可能感興趣的試題

單項(xiàng)選擇題

If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.

A.Skip zone
B.Blackout zone
C.Diffraction zone
D.Shadow zone

單項(xiàng)選擇題

Automatic identification systems（AIS）are required to（）.

A.provide safety-related information automatically to shore stations，other vessels and aircraft
B.receive safety-related information automatically from similarly equipped vessels
C.exchange safety-related information with shore-based facilities
D.All of the above

99色精品-9色在线-99色在线-99色视频 国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

In using Loran-C，skywave reception gives greater range but is（）.

你可能感興趣的試題

If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.

Automatic identification systems（AIS）are required to（）.

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

In using Loran-C，skywave reception gives greater range but is（）.

If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.