PRENAV announced that it has raised $6.5 million in seed financing from lead investor Crosslink Capital, along with Haystack, Liquid 2 Ventures, and WI Harper Group. These organizations join existing investors Pejman Mar Ventures, Toivo Annus, and others. The commercial drone company is developing automated drones that are guided by computer vision. PRENAV drones are able to safely fly in complicated or GPS-denied environments…