What frequency do the rescue distress signal satellite systems continue to monitor for?

The correct frequency for rescue distress signal satellite systems to monitor is 406 MHz. This frequency is designated for use by emergency locator transmitters that are part of the international distress alerting system. The 406 MHz signal is essential for search and rescue operations because it provides accurate location information to rescue teams via satellite technology.

The transition from the previous standard of 121.5 MHz to 406 MHz has enhanced the effectiveness of search and rescue missions by allowing for more precise tracking of distress signals. The 406 MHz frequency also supports digital information transmission, which can include details about the identity and type of the emergency, enabling faster response times by authorities.

In contrast, 121.5 MHz was primarily used for general aviation distress calls, and while still monitored by some organizations, it is not the preferred frequency for satellite-assisted distress signals anymore. The other frequency options, such as 128 and 432 MHz, are not utilized for this specific purpose.