-- card: 52415 from stack: in -- bmap block id: 0 -- flags: 4000 -- background id: 7720 -- name: #170 ----- HyperTalk script ----- on openCard global group,rightone put 18 into group put "C" into rightone pass openCard end openCard -- part contents for background part 20 ----- text ----- Question #18 -- part contents for background part 1 ----- text ----- 4BD-4.3 What is the "triangulation method" of direction finding? -- part contents for background part 11 ----- text ----- Using the geometric angle of ground waves and sky waves emanating from the same source to locate the signal source -- part contents for background part 27 ----- text ----- A fixed receiving station uses three beam headings to plot the signal source on a map -- part contents for background part 28 ----- text ----- Beam headings from several receiving locations are used to plot the signal source on a map -- part contents for background part 29 ----- text ----- The use of three vertical antennas to indicate the location of the signal source -- part contents for background part 43 ----- text ----- Correct answer is C