A mobile monitoring device for continual remote monitoring of a condition is provided. The device includes a sensor module for producing sensor module data including inertial navigation data. A first transceiver component receives network manager data including inertial navigation data from a local network manager and may transmit sensor module data to the network manager for remote monitoring by a server. An associator component establishes an association with the local network manager if inertial navigation data of the sensor module and local network manager approximate each other and dissolves the association of the inertial navigation data of the sensor module and local network manager does not approximate each other. An inertial navigation component incrementally estimates a geographical location of the monitoring device using the previously received geographical location data and subsequent sensor module inertial navigation data.