National Ocean Service (Continued) 
Tidal Current Diagrams 
Publication Interval: Annually 
Location: Long Island Sound and Block Island, Boston 
Harbor, New York Harbor, and Upper Chesapeake 
Bay 
Contents: Each publication contains a series of 12 monthly diagrams to be 
used with the tidal current charts to give the users a convenient method to 
determine the current flow on a particular day. 
Available From: Distribution Division (C44) 
National Ocean Service 
6501 Lafayette Ave. 
Riverdale, MD 20737 
or other sales agents. 
