Filed under: GPS, WearablesIt looks like the US Marines will soon be adding yet another bit of gear to their already well-equipped high-tech arsenal, with Rockwell Collins announcing that it's set to provide 'em with 3,000 of its head-mounted ParaNav GPS units, which will be used to give parachutists a bit of guidance assistance. As you can see at the right, the system makes use of a heads-up display for maximum convenience and added sci-fi effect, which is apparently full-color and able to attach directly to parachutist's goggle's or helmet shield. As if that wasn't enough, the rig also sp