The RockFLEET Tracker is a truly global tracking device designed for permanent use aboard marine vessels and land vehicles. It has an optional GSM unit, which allows it to use terrestrial mobile phone networks when possible, automatically switching to the global Iridium satellite network when GSM is not available. It is designed for permanent installation on ships, yachts, vehicles and other assets. The unit is waterproof, ruggedised, with a variety of mounting options to suit your needs. The RockFLEET also allows short messages (like SMS, social media updates and short emails) to be sent using a paired Bluetooth device (such as a smartphone) and the Messenger app. This allows for full two-way communication wherever you are, even when out of mobile network range.