On our Unit all the TFOs are trained in the use of the Grampian data and as such their advice is seen by their senior officers as tactical advice and accepted as such therefore if a request is declined the senior officers understand the decision has been made by experts and therefore unnecessary waste of flying hours is averted.
Secondly the TFOs will only consider lifting for a missing person if they deemed by the investigating officer to be high risk and that said there are certain strict criteria that have to be satisfied prior to deployment.
All of the above insures that ground supervisors complete their most basic enquiries prior to requesting an air-asset instead of making an unjustified request to complete a speculative search again wasting flying hours.
The result of this use of data can increase the units location of missing persons and on many occasions missing persons have been found thanks to input from the TFOs without having to leave the office.