SCIENTIFIC APPARATUS, NAMELY GLOBAL POSITIONING SYSTEM UNITS AND RADIO TRANSMITTERS; DATA RECORDING APPARATUS NAMELY COMPUTERS AND HAND HELD DATA LOGGERS; COMPUTER PERIPHERALS; COMPUTER SOFTWARE, NAMELY SOFTWARE FOR FACILITATING BLAST DESIGN, THE COMPILATION OF DATA FOR BLASTHOLE LOAD SHEETS, THE TRANSFER OF BLASTHOLE LOADING INFORMATION TO EXPLOSIVES DELIVERY UNITS, THE PROCESSING OF BLASTHOLE LOADING INFORMATION, THE CREATION OF BLAST SUMMARY DATA AND REPORTS, THE TRANSFER OF THE AFOREMENTI...