Deep-sea researchers have completed the first full-size digital scan of the Titanic, showing the entire wreck in unprecedented detail and clarity, the companies behind a new documentary on the wreck said Thursday. Using two remotely operated submersibles, a team of researchers spent six weeks last summer in the North Atlantic mapping the whole shipwreck and the surrounding 3-mile debris field, where personal belongings of the ocean liner’s passengers, such as shoes and watches, were scattered. Richard Parkinson, founder and chief executive of deep-sea exploration firm Magellan, estimated that the resulting data — including 715,000 images — is 10 times larger than any underwater 3D model ever attempted before.