Final answer:
The international distress frequency in the VHF band is 121.5 MHz, used globally for emergency communications, particularly in aviation.
Step-by-step explanation:
The international distress frequency in the VHF (Very High Frequency) band is 121.5 MHz. This is a frequency specifically reserved for emergency communications and is used across the world for airborne distress, such as by aircraft in an emergency. VHF bands are used for different purposes, including TV broadcasting and other communications, with VHF TV channels utilizing frequencies in the ranges of 54 to 88 MHz and 174 to 222 MHz.