What type of systems supply data for aircraft positioning and navigation?

The correct choice is radio navigation systems because they are specifically designed to provide accurate positioning and navigation data for aircraft. These systems utilize radio signals from ground stations or satellites to determine the aircraft's location, speed, and altitude. Methods such as GPS (Global Positioning System) and VOR (VHF Omnidirectional Range) are examples of radio navigation systems that greatly enhance flight safety and efficiency.

Manual systems rely on visual references or pilot navigation skills, which can lead to inaccuracies or inefficiencies, especially in poor visibility or complex environments. Optical systems, while they can assist in navigation, are not primarily used for aircraft positioning as they depend heavily on visual cues, which may not always be reliable in aviation. Analog systems typically refer to older technology and components that do not provide the precision or capabilities of modern digital radio navigation systems, rendering them less suitable for contemporary aircraft navigation needs.