That's my assumption as well but I'd have assumed that'd be the case with basically anything except on-site search parties (though I'd hope they could do that as well haha). I'm with you though!
"The jet’s transponder, which usually helps locate the aircraft, was not working “for some reason that we haven’t yet determined,” said Jeremy Huggins, a spokesman at Joint Base Charleston. “So that’s why we put out the public request for help.”