Oh well, same thing happened to me today. Yesterday I had to log out while in one of the sections of the cargo ship (i believe its called Rifys). Spawned in today and i was inside a rock below the shipwreck. I am new to the game and understand it is early acces alpha but i had a .357 Magnum, FNX45, SKS and even managed to find a Longhorn and it seems im going to have to lose everything ;_;