... 25-28, 143 , 144 mean 38, 83, 84, 86, 123, 149 , 226, 227, 232, 233 mechanical 2, 14- 16, 23, 30-34, 38, 44-47, 58, 62, 102, 118, 146 , 179, 243, 248 Index mechanical-scanner ... 215 tractor-trailer 144 , 145 trailer 138, 139, 144 , 145 , 222, 238, 243, 248 trajectory 133, 140 , 150, 196, 215, 216 Trak-Star ... 199, 210 heading 15, 21, 22, 24, 30, 45-47, 53, 54, 57, 58, 66, 80, 143 , 144 , 148 , 150, 153, 159, 163166, 169, 187, 214, 247, 253 helicopter 33, 103, 258 helium-neon...