I'm not a native speaker either and I think what threw me off was the "Man Overboard" bit, which is usually used as a "maritime call" so to speak. So in other words, it wasn't clear to me who was overboard, the father-son duo or somebody else. What I think the title should have been is "Ghost Boat with Garmin GPS Leads Father-Son Duo to a Man Overboard", notice "a man overboard" to clearly indicate that they were led to someone who was overboard.