Navigational, surveying, audiovisual, optical, weighing, measuring, signaling, detecting, testing, checking, rescue and teaching apparatus and instruments, namely heads-up displays (HUDs) in the nature of transparent electronic displays for use as a wearable device or integration into wearable devices, for projection of data from a mobile device onto a display, vizor or windshield, for providing motorcycle riders or other users with navigational and operational information; apparatus and inst...