There's a function menu. It's, um... that little button by the screen, up kind of near the top? Press it, and it should open up a menu. Then you can scroll with the navigation buttons. There's an option for a GPS beacon. Up near the top of the list.

[ Assuming he knows which button she's talking about, and he's found the navigation buttons. She speaks quickly, and does not offer to explain further, because there's something else to focus on. ]

I can help you find it in person if you need me to. You have a wolf? You mean a wolfhound, right?