Long Island Sound packs history, high-tech boating and fun in an estuary that stretches 90 nm between New York City and Block Island, RI. Long and slim-looking on the chart, it is actually up to 20 nm wide in the middle. Much as New York is just “the City,” Long Island Sound requires no further name than "the Sound" in local conversation. It’s a major commercial artery, an important fishing and lobstering ground and one of the famed cruising areas of the U.S.