GSM Module adds least cost data routing to new RockFLEET Global Vessel Tracking System Dec 17, 2014A new GSM module developed for the recently launched RockFLEET vessel tracking system introduces least cost routing functionality via terrestrial networks, giving users the opportunity to transmit position data via Iridium globally and switch to terrestrial networks when in range. With user-definable position reports or short text messages from anywhere in the world costing as little as £0.03, RockFLEET is already a highly