When should ELT batteries be replaced or recharged after an emergency?

The correct answer is that ELT batteries should be replaced or recharged after 60 minutes of transmissions.

Emergency Locator Transmitters (ELTs) are critical safety devices designed to facilitate search and rescue operations by transmitting distress signals in the event of an emergency. The operational specifications for these devices clearly state that if an ELT is activated and transmits a distress signal, it is expected to function properly for a defined period. In the case of continuous transmission, the battery life is rated to support at least one hour of operation. Therefore, after 60 minutes of active transmission, it is essential to replace or recharge the batteries to ensure that the ELT can function effectively in further search and rescue efforts as needed.

Understanding this specification is essential as it emphasizes the importance of maintaining operational readiness for emergency equipment in aviation, ensuring that the devices are reliable when they are most needed. In contrast, the other durations mentioned do not align with the established guidelines for ELT battery management, reinforcing the criticality of adhering to operational limits to guarantee safety.