This 3-D fly-through of Hudson Canyon, 100 miles east of New York City, is one way to display multibeam data. The Hudson Canyon data has been critical in helping scientists to understand an event that, in June 2013, caused a strong tsunami-like surge along the northeast U.S. coast. Mapping data we collected in Hudson Canyon before and after the event is being used to help determine what caused this surge (and others similar to it). These surges pose unevaluated potential hazards, so understandin