Many government agencies concerned with shipping and maritime matters provide information freely online. A selection of such resources follows. Additional government agencies may be found through Internet search engines:
Delaware River Port Authority of Pennsylvania & New Jersey
Erie Western Pennsylvania Port Authority
Homeport 2.0: Department of Homeland Security: United States Coast Guard: Office of Port & Facility Compliance
Philadelphia Regional Port Authority
Port Authority of New York & New Jersey
United States Department of Transportation: United States Maritime Administration