Which type of navigation involves comparing the phase angles of two or more radio signals that are synchronized to a common time base?

The concept of navigation that involves comparing the phase angles of two or more radio signals synchronized to a common time base is known as hyperbolic navigation. This method uses the differences in the time of arrival of signals at two or more receiving stations to determine the position of the receiver. By knowing the precise time when signals were transmitted and comparing the timing of their arrival, the system can calculate hyperbolic lines of position.

Hyperbolic navigation systems, such as LORAN (Long Range Navigation), exploit the concept of phase differences to ascertain the user's location. As the signals travel at the speed of light, the receiver can calculate its position based on the varying time it takes for signals from different transmitters to reach it, resulting in hyperbolas being formed on a chart. The intersection of these hyperbolas gives the precise location of the receiver.

Other forms of navigation, such as triangulation, satellite navigation, and vector navigation, do not primarily rely on synchronizing phase angles of radio signals, but rather involve different methodologies for determining location.