to inform other parties to the communication as to the conditions of usage it is understood that any combination of any or all of the above techniques used in any measure are understood to be part of the present disclosure and are optionally used in conjunction with any combination or all of the inhibitions taught in the present disclosure it is understood that precise positioning is able to replace any or all of the techniques of refinement of position without deviating from the present disclosure it is an option of any of these embodiments that motion on a train ship or aircraft is determined by determining that the jerk or first time differential of motion is below a threshold this is calculated by taking the successive time differentials of the position or speed as appropriate and deducing the jerk comparing this to a threshold and permitting the use of the service provided that the jerk is below this network enabled or otherwise constant jerk threshold it is an option of any of these embodiments to likewise make a azimuthally determined heading change and permitting use provided the value is below an acceptable value an indication of motion on a train ship or aircraft unlike terrestrial vehicles in the land family with a larger jerk and quicker azimuth changes in yet another aspect of the present disclosure a threshold beyond those presently established for discerning operator use is exploited i e signals so processed must exceed.