What frequency range does the PRC-150 communicate across?

The PRC-150 is a versatile radio communication device used primarily by military operations, capable of operating across multiple frequency bands. In this case, the correct answer highlights its functionality in both HF (High Frequency) and VHF (Very High Frequency) ranges.

HF communication capabilities allow for long-distance communication, making it useful for tactical operations where range and propagation conditions can vary significantly. These frequencies are adept for skywave propagation, allowing communications to occur over great distances.

The reference to VHF in the correct choice indicates that the radio can also operate effectively within the line-of-sight range, typically up to about 10 kilometers depending on environmental conditions. This dual capability provides operational flexibility, allowing units to communicate effectively both over long distances and within closer ranges where higher frequency signals are more suitable.

Thus, the frequency range communicated through by the PRC-150 encompasses both the indefinite coverage provided by HF and the more localized range of VHF, as described.