Rockville, Md : Dept. of Commerce, National Oceanic and Atmospheric Administration, National Ocean Survey : for sale by National Oceanic Survey or authorized sales agents, [1977?].
Inserts included: "Tables for Long Island Sound and Block Island Sound, Tidal current charts, Sixth edition-1977" and "Tidal current diagrams for Long Island Sound and Block Island Sound, Tidal Current Charts, 1978". "These charts supersedes [sic] both the 'Tidal Current Charts, Long Island Sound and Block Island Sound,' Fifth Edition 1973; and 'Tidal Current Charts, Block Island Sound and Eastern Long Island Sound,' First Edition 1971."--P. 2.