<var id="qeclv"></var>

<pre id="qeclv"><acronym id="qeclv"></acronym></pre>

<input id="qeclv"></input>

<sup id="qeclv"></sup>

<s id="qeclv"></s>

單項(xiàng)選擇題

Loran-C is which type of system（）.

A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation

你可能感興趣的試題

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

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

<var id="axtir"><em id="axtir"></em></var><big id="axtir"><pre id="axtir"></pre></big>

<pre id="axtir"><pre id="axtir"></pre></pre>