Tragedy is an understatement. What were they thinking? Where was the point of no return? Who or what was navigating?
Could be a triple tragedy. The watch may have ended with a medical emergency and the pilot was not conscious.
Pure conjecture but I think it's the autopilot and the smart phone. We have outsmarted ourselves with smartphones. We have grown complacent, lackadaisical. "It's all good" "My cell phone will call me if there's a problem" "The autopilot has my back"
During my all too brief experience as captain I always woke up wondering: "Where is the boat?" "Are the boat and the crew safe"? It was a survey boat and we lived to stay safe and map the bottom of the ocean. 110 foot, steel hull, converted supply vessel drawing about 10 feet and with a crew of nine. A "party boat".
The map table was right behind the helm and the wheelman was between. We were a system. Now we have a system and a network.
One time the head Geologist/Geographer/Navigator stressed out severely over an issue with location and got off the boat for a break as a result. We had LORAN back then. We used triangulation with UHF radios to position within one meter. The two systems didn't agree and it took a while to notice that the LORAN unit was "cycling". We took this stuff seriously, it was life or death.
Modern conveniences are great until they kill someone.