There used to be only one or two players in the GPS Fleet Tracking System market.从前是只有一两个在GPS舰队跟踪系统的市场参与者。 Qualcomm out of San Diego and a few others.高通公司出圣地亚哥和其他一些。 Nowadays fleets can use cell signals instead of satellite systems to track their fleets.现在车队可以使用手机的信号,而不是卫星系统,跟踪他们的车队。 Small systems can be wholly owned by the fleets while larger systems require monthly charges.小型系统可以全资拥有的船队而较大的系统需要每月费用。 Fleet [...]舰队[...]