Question

Older 121.5 MHz analog signal ELTs may _______ (simultaneously/individually) transmit an emergency signal on a frequency of 243.0 MHz. The use of 243.0 MHz has long been the military emergency frequency.

1) simultaneously
2) individually

Answer 1

Older 121.5 MHz ELTs can simultaneously transmit on both 121.5 MHz and 243.0 MHz, the latter being the military emergency frequency.

Step-by-step explanation:

Older 121.5 MHz analog signal Emergency Locator Transmitters (ELTs) can simultaneously transmit an emergency signal on a frequency of 243.0 MHz, which has long been designated as the military emergency frequency. In the context of the electromagnetic spectrum, these frequencies are part of the radio wave band, which is used for a variety of communications technologies. For instance, AM and FM radios operate at lower frequencies, whereas cellular signals, Wi-Fi, and GPS use higher frequencies that are less absorbed by building materials, allowing for effective transmission.