Under what condition is it permissible to fly an aircraft without an ELT?

Flying an aircraft without an Emergency Locator Transmitter (ELT) can be permissible under several specific conditions, and one of those is when any of the noted circumstances apply.

One key condition allowing for the absence of an ELT is when an aircraft is classified as an ultra-light airplane. Ultra-light aircraft are generally not subject to the same stringent regulations as larger aircraft, which include ELT requirements.

Another permissible scenario is when an aircraft is operated by a flight training unit within a distance of 25 nautical miles from the airport. This more localized operation recognizes that the risks associated with being close to the airport, where recovery options are more accessible, may justify an exemption from the ELT requirement.

Additionally, if the ELT is unserviceable, it can be removed from the aircraft for a fixed duration, specifically for up to 30 days, as long as a proper placard indicating its removal is displayed. This temporary removal acknowledges that the ELT should be functional but provides a sensible period during which the operator can arrange for repair without being in violation of regulations.

Thus, the accurate answer encompasses all these scenarios, reinforcing that pilots must be aware of specific regulations allowing for the operation of an aircraft without an ELT under defined conditions.