. . .A good deal of the bulk in my kit can be contributed to the Idea of "staying found"
IE: GPS, Compasses, Maps, Whistle, Extra Batteries.  I could loose almost a pound of a 5 pound core kit, on these items alone.  But that would not be a bright move, since they greatly promote avoiding a "survival situation", in the first place.
 
Excellent point.  They may be redundant, but staying found is a huge step in avoiding an unintended overnight or worse assuming you can't find yourself the next day.  My small GPS weighs ounces but will show me exactly where I am in relation to any point I've programmed (my truck, my last turn point, etc.) or I can just use UTM to find myself on a map.  If I was in a mood to drop weight, it would be difficult to justify dumping my navigation.