navigation transmitter造句

For some non-directional beacons ( NDBs ) the height can be as low as 10 meters, while for more powerful navigation transmitters such as DECCA, masts with a height around 100 meters are used.
And you need an earth connection, < < 2000 ohm, as well I set up a long wire antenna in a park next door to a long wave navigation transmitter ( 2 kW ), using a water pipe as earth and could not get enough for the transitor to amplify.
It's difficult to find navigation transmitter in a sentence. 用navigation transmitter造句挺难的