For an aircraft, couldn't you use radar mapping to get a very good fix if you were overflying a know area? This is how TERCOM worked. In that case the waypoints would be very specific, but I would have thought strategic bombers now adays could carry the radar imagery of an entire theater for reference purposes. This would mean illuminating your radar, but depending on the threat or stand off range, that would be acceptable in most situations. If nothing else, it might allow precise terminal weapon delivery and presumably the gig is up once you start releasing weapons anyway.