This paper covers the wide area and short range locational technologie
s that are available for vehicle tracking in particular and mobile use
r security in general. It also summarises the radio communications ser
vices that can deliver information to the user. It considers the use t
hat can be made of these technologies, when combined with procedures f
or delivering a response, in the security field, notably in relation t
o personal security, high-value load protection and the after-theft tr
acking markets.