What indicates the EPIRB has been successfully deployed?

The successful deployment of an EPIRB (Emergency Position Indicating Radio Beacon) is indicated by an activation signal on the selected frequency. When the EPIRB is activated, it transmits a signal that can be picked up by satellites or other receiving stations. This signal is crucial as it communicates the device's location and alerts search and rescue teams to the distress situation.

The signal typically operates on a frequency designated for distress alerts, allowing it to be identified quickly in emergency scenarios. Recognizing this signal is a vital part of ensuring that aid can be dispatched promptly to the location of the emergency.

While other options might imply receiving some form of confirmation or functional aspect of the EPIRB, they do not specifically confirm successful deployment in the same way the activation signal does. Therefore, the activation signal on the selected frequency serves as the direct and definitive indication that the EPIRB is functioning correctly and has been deployed.