An iridium communications and navigation module (ICNM) has been developed for movement tracking applications. External interfaces to the ICNM include Ethernet, RS-232, and Serial Peripheral Interface (SPI) Bus. The module is powered by Power over Ethernet (PoE) or a +24VDC connection. The ICNM fits within the standard PC104 form factor, but utilizes a Modular Component and Sensor Bus (MCSB) interface specification for the high density connector. The ICNM includes a GPS receiver and accelerators for satellite and inertial tracking. The module manages all of the satellite communication control, encryption, and navigation functions that enable its rapid integration as a component into larger systems.