Which of the following is a key feature of enhanced guidance systems?

The correct choice highlights the use of satellite technology as a key feature of enhanced guidance systems. Enhanced guidance systems like those found in modern missile systems often incorporate advanced technologies, including global positioning systems (GPS), to improve their accuracy and reliability. The integration of satellite tech allows for real-time updates on positioning and trajectory, enabling the missile to make precise adjustments during flight. This capability significantly increases the effectiveness of these systems in hitting moving or stationary targets, even under challenging conditions.

In contrast, relying on manual tracking would not be characteristic of enhanced guidance systems, which aim to reduce human error and improve automation. The assertion that the Patriot system does not require guidance systems is inaccurate, as guidance systems are fundamental for the missile's trajectory and target acquisition. Moreover, limitations to physical targets do not align with the principles of enhanced guidance, which are designed to improve targeting capabilities, not restrict them.