At what time is the test of the ELT permitted?

At what time is the test of the ELT permitted?

• A. On the hour
• B. Mid-hour
• C. Three minutes after the hour
• D. Five minutes within the hour.

Answer: (D)

Testing an ELT is restricted to a short window after every hour. This ensures the test won’t flood airwaves with distress signals and that the test is predictable. The allowed time is during the first five minutes after the hour, typically for a brief duration like one minute. So the correct choice matches that window: five minutes within the hour. Times outside that window, such as exactly on the hour or later in the hour, aren’t permitted, and while three minutes after the hour falls within the first five minutes, the regulation is framed around the five-minute window after the hour, which is why the option describing five minutes within the hour is the best fit.

Testing an ELT is restricted to a short window after every hour. This ensures the test won’t flood airwaves with distress signals and that the test is predictable. The allowed time is during the first five minutes after the hour, typically for a brief duration like one minute. So the correct choice matches that window: five minutes within the hour. Times outside that window, such as exactly on the hour or later in the hour, aren’t permitted, and while three minutes after the hour falls within the first five minutes, the regulation is framed around the five-minute window after the hour, which is why the option describing five minutes within the hour is the best fit.