How accurate is radio-location?

The accuracy of a conventional cave survey, constructed using compass, clinometer and tape, and the treatment of the associated surveying errors has been well-discussed. Such surveys are sometimes "corrected" by means of radio-location; but the accuracy of radio-location techniques has not been widely debated. Properly understood, radio-location errors can be subjected to the same treatments as other surveying results. As well as the measurement errors of distance and angle, radio-location accuracy may be affected by the use, in conditions where it is not valid, of the traditional 'quasi-static' model of the field lines