Are ELTs required in all aircraft?

Emergency Locator Transmitters (ELTs) are crucial safety devices designed to aid in the search and rescue of downed aircraft by transmitting a signal when activated. While the regulation requires many aircraft to be equipped with an ELT, there are specific exceptions that could apply to certain categories of aircraft, such as those operating under specific circumstances or those that are not required to be operated in uncontrolled airspace.

For instance, aircraft that are used for agricultural purposes or certain types of experimental or light sport aircraft may not be required to have an ELT installed. Additionally, ultralight vehicles and certain very light aircraft may also fall outside the requirement for ELT installation.

Thus, the correct answer reflects this regulatory framework, acknowledging that while ELTs are generally required for many aircraft types, there are indeed specific exceptions that allow for flexibility in compliance based on the aircraft's use and category.