This report describes the status of the project "Jamming of Navigation Systems", which is part of the research program "Electronic Warfare". A presentation of the work according to the project plan with long-term goal and its realization is given in the introduction, followed by a list of trends in the field of navigation techniques. The problem in the project is of multidisciplinary character and spans multiple research areas. The presentation of ongoing activities is followed by a list of related projects and studies, reports, visits and contacts together with events of special interest. Finally, the project´s future aim and direction are discussed.