Discussion
The underwater locator beacon is required to operate for at least
Answer: B
Correct answer: 30 days after activation
The underwater locator beacon must transmit for at least 30 days from activation, which sets the window a search has to find it acoustically.
The figure has proved tight in deep-water accidents where the site was uncertain, and some installations now carry beacons specified for 90 days, with a low-frequency airframe beacon detectable at greater range. The period is bounded by battery capacity in a sealed unit that must also survive the crash and the pressure at depth.
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