Lan Ha Bay is located east of Cat Ba island and south of Ha Long Bay (Quang Ninh), with nearly 400 large and small islands.
Bell 505 helicopter, number VN-8650, crashed in the sea bordering Lan Ha Bay (Hai Phong) and Ha Long Bay (Quang Ninh). There were five people on the helicopter, including a pilot, Colonel Chu Quang Minh, and four Vietnamese tourists.