RT Journal Article SR Electronic A1 Vrábel, Ján A1 Hudák, Anton T1 JF Doprava a spoje YR 2010 VO 6 IS 1 SP 228 OP 233 UL https://tac.uniza.sk/artkey/das-201001-0026.php AB This article looks at monitoring of the vehicles which are using the GPS technology. At the beginning we have talked about the GPS system and consequently its application by vehicles monitoring in status on line communication. In the article are analysed some disadvatages occured by monitoring the changes of cubage of the power fuel