Navigation apparatus for boats; Navigation apparatus for vehicles; Navigation apparatus for vehicles in the nature of on-board computers; Navigational apparatus for automobiles; Navigational instruments for vehicles; Car navigation computers; Electric navigational instruments; Electronic navigational and positioning apparatus and instruments; GPS navigation device; electronic navigational and positioning apparatus and instruments, vehicle navigation systems featuring interactive displays, namely, head-up displays for use in general aviation aircraft, namely, transparent electronic displays for providing aircraft crew members with navigational and operational information; electronic navigational and positioning apparatus and instruments, vehicle navigation systems featuring interactive displays, namely head-up displays for use in military and commercial aircraft, namely, fixed and helmet mounted transparent electronic displays for providing aircraft crew members with navigational and operational information; electronic navigational and positioning apparatus and instruments, vehicle navigation systems featuring interactive displays, namely heads-up displays (HUDs) in the nature of transparent electronic displays for use in providing personal navigation information to drivers of vehicles; electronic navigational and positioning apparatus and instruments, vehicle navigation systems featuring interactive displays, namely, heads-up displays (HUDs) in the nature of transparent electronic displays for use in navigation of personal vehicles and navigation by foot, namely, providing personal navigation information to drivers of vehicles and providing personal navigation, namely, projecting data from a mobile device onto a vehicle windshield, lens of glasses and the visor of a helmet; Satellite navigational system, namely, a global positioning system (GPS); Satellite-aided navigation systems; electronic navigational and positioning apparatus and instruments, vehicle navigation systems featuring interactive displays, aircraft landing guidance apparatus, namely, transparent electronic displays fixed at head-level or head-down positions for use in military and commercial aircraft for providing aircraft crew members with navigational and operational information