This is just another CFIT incident where a confused crew flew a perfectly serviceable aircraft into the water, had it been hard terrain they probably would have killed everyone on board. No CRM or bad CRM who knows, one could look at fatigue with average of 90 plus hrs for the PIC over the past 3 months, only 60 plus for the FO, however, looking at the weather, pics etc, there are no reasonable excuses for this nonsense. Initial recommendations may as well say " don't crash"