NEW : Ship , after pirates released it , took off with some cargo . Ship went missing on July 2 within an hour of departing port . Sunrise 689 dropped off radar in the middle of a busy shipping zone in the Singapore Strait . 18 crew were on board the ship which was bound for Vietnam .
NEW : Ship , after pirates released it , took off with some cargo . Ship went missing on July 2 within an hour of departing port . 18 crew were on board the ship which was bound for Vietnam .