I'm guessing cockpit fire of some sorts or electrical system failure. Pilots turn plane around try to find land. But with no nav or avionics of Anykind and being middle of night they can't see where they are at and their altitude they eventually crash into the water. Being they dropped alt as soon as the transponder went off I'm guessing that's what happened.
Only problem I had was an ice patch trying to turn onto my street. I Slid past my street, put it in reverse then slid past street in reverse. Third time I finally was able to make the turn into street.
I have the smaller harbor freight box that I use as my roll around cart. 2 years later its still kicking. I've had zero problems with it. Would recommend to anyone