Abstract: A method of enhancing the safety of a region includes defining a set of rules for the region. Collecting field data from a plurality of mobile stations movable throughout the region. The field data includes information relating to the relative movement of the mobile stations. Comparing the collected field data to the set of rules to identify one or more areas of potential risk within the region.

Abstract: A method of enhancing the safety of a region includes defining a set of rules for the region. Collecting field data from a plurality of mobile stations movable throughout the region. The field data includes information relating to the relative movement of the mobile stations. Comparing the collected field data to the set of rules to identify one or more areas of potential risk within the region.

Abstract: A virtual wireless computer network allows communication between a number of regions (F, G, H), which may be beyond normal wireless communication range, by carrying information between regions using mobile stations (5) which travel between regions. Each mobile station transmits and/or receives information by wireless communication to other stations within a region when it is in that region, to update both the stations in that region and the mobile station. One region may include a fixed station (8) hardwired into a backbone network (9). The network has particular application in a mining situation where the mobile stations may be haul trucks (5) carrying information between people 6 and light vehicles (7), with the fixed station at a crusher or shovel (8).