Electronic navigational aids; loran, radiobeacon, and radarbeacon systems and loran, radio-direction-finder, and radar ship equipment 

 - 1st 
 - United States  Govt. Printing Office  1949 
 - 73p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radar
<br/><br/><label>Dewey Class. No.: </label>621.38  / U843