S-MDA.COM

SAT-Trak technology enables fishing fleets to fit Identifier AIS transceivers and tracks them across our entire EEZ at an affordable cost... However the primary challenge for all AIS satellite systems is their ability to firstly detect an AIS transmission which has travelled from the transmitting vessel a distance of 600 miles to the satellite through the earth's turbulent atmosphere - ambient radio noise from other radio systems and weather etc. This journey results in transmissions becoming corrupted and their strength significantly reduced. The second issue stems from the fact that all radio systems have a finite capacity which is defined by their frequency allocation and the size of each transmission. The AIS standards recognised this potential issue and as such uses a sophisticated TDMA radio access scheme which allows the available capacity at any given moment in time to be dynamically and automatically managed by the transceivers themselves and avoid two transceivers..