Final answer:
The TACAN system operates in the Ultra High Frequency (UHF) band, which ranges from 300 MHz to 3 GHz and is pivotal in military aviation navigation.
Step-by-step explanation:
The TACAN system, which stands for Tactical Air Navigation System, operates in the Ultra High Frequency (UHF) band of frequencies. This system is critical for military use, providing users with the ability to determine their bearing and distance from a TACAN-equipped station. While many technologies use various bands in the electromagnetic spectrum, such as 4G signals at approximately 880 MHz and Wi-Fi networks from 2.4 to 5 GHz, the UHF band typically ranges from 300 MHz to 3 GHz. Within this range, TACAN operates to assist in aviation navigation.