True or False: Both UHF and VHF systems have dedicated Guard receivers.

The statement that both UHF and VHF systems have dedicated Guard receivers is false.

In aviation communication, the term "Guard" refers to specific frequencies that are monitored continuously for emergency communications. The UHF (Ultra High Frequency) system does indeed have a dedicated Guard receiver that monitors the 243.0 MHz frequency, typically used for emergency situations. However, while VHF (Very High Frequency) communication systems have emergency frequency capability, they do not have a dedicated Guard receiver in the same way that UHF does.

VHF systems typically monitor 121.5 MHz for emergency communication, but this does not imply they have a dedicated receiver like the UHF systems do. Thus, the correct assessment is that the statement is false, as only the UHF system is noted for having a dedicated Guard receiver.