Assertion: frequency | /r/HasProperty | 121.5 mhz
Facets:
value: for civilian
type: PURPOSE
Source sentences:
text: The frequencies are 121.5 MHz for civilian, also known as International Air Distress (IAD) or VHF Guard, and 243.0 MHz for military use, also known as Military Air Distress (MAD) or UHF Guard.