Which of the following is NOT a type of satellite-guided navigation system?

The correct answer is D, ALCROSS, as it is not recognized as a type of satellite-guided navigation system. GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), and Galileo are all well-established satellite-based navigation systems used globally for determining precise geographic locations and providing timing services.

GPS, developed by the United States, is widely known and extensively used for navigation in various applications, including aviation, maritime, and terrestrial navigation. GLONASS, developed by Russia, provides similar capabilities and functions, allowing users to pinpoint their location through satellite signals. Galileo, the European Union's satellite navigation system, aims to provide improved accuracy and reliability in navigation compared to its predecessors.

In contrast, ALCROSS does not belong to any of these recognized navigation systems and may refer to something unrelated to satellite-based navigation. By identifying ALCROSS as the outlier, one can appreciate the significance and functionality of established systems like GPS, GLONASS, and Galileo in aiding navigation and positioning on a global scale.