No known copyright restrictions.
This work is licensed for use under a Creative Commons Attribution Non-Commercial No Derivatives License (CC BY-NC-ND).
Publisher:
Washington, D. C. :
United States Coast and Geodetic Survey
Scale:
Scale 1:1,200,000
Notes:
Title from item.
Inset map: Boston Harbor, Massachusetts.
Inset map: Portland Harbor, Maine.
Inset map: Delaware Breakwater.
Inset map: Entrance to Delaware Bay.
Inset map: Entrance to Chesapeake Bay.
Inset map: New York Entrance.