Before hiking in remote areas, always carry a personal locator beacon and know how to activate it.

Before heading into the backcountry, we rented personal locator beacons in case of an emergency.

The airline requires all small aircraft to carry emergency locator transmitters to improve search-and-rescue response times.

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We scheduled a central location test to evaluate how consumers interacted with the redesigned packaging under controlled conditions.

Before reporting the results, the researchers ran several central location tests to determine whether the distributions differed.