000 00612cam a2200193 4500
001 ABS61249
008 000000n1999 000 0 eng u
035 _a(Sirsi) u101864
100 _aDoyle, N.
245 _aHeavenly helpers.
260 _c1999
490 _aConstruction News
_v(6633) 16 September 1999, 26(1)
520 _a Explains how the Global Positioning System (GPS) is being used to maintain accuracy on the Channel Tunnel Rail Link project.
650 _aGPS
650 _aGLOBAL POSITIONING SYSTEM
650 _aCHANNEL TUNNEL RAIL LINK
690 _aMAPPING AND MEASUREMENT
942 _n0
999 _c60969
_d60969