Consumer versus Military GPS Receivers in a JAMMING Environment
by Joe Mehaffey

How do "Consumer Model" GPS receivers compare with Military Grade GPS Receivers as to being JAMMED by enemy actions?

It is highly unlikely that consumer users need be troubled by this question.  However, those selecting consumer GPS receivers for use by our soldiers overseas need to be aware that there IS a difference.  Military receivers are protected against jamming by sophisticated design technology not available to designers of civilian GPS units.  Yet,  consumer GPS receivers can be extremely useful in most circumstances to soldiers and civilians traveling in a war zone.  It never hurts to know the limitations of equipment and this article discusses the advantages of use of a Military PLGR or DAGR model receivers. 

The following is copied from the GPS PROGRAM OFFICE "PATHFINDER" dated October 2004