I understood it first time. What was confusing to you?
Ghost Boat - Either the craft didn't exist or it has no pilot
With Garmin GPS - okay, it's the no pilot case
Leads - Okay, they followed it to a waypoint or they discovered it motoring aimlessly
Father-Son Duo - these two were the rescuers, cool
To Man overboard - okay, pilot fell off the boat
Definitely clear to me on first read and enough for me to click through.