| waterways.org | National Waterways Conference, Inc. |
| uscg.mil | United States Coast Guard (USCG) |
| marc2000.org | Marc 2000 - Midwest Area River Coalition |
| dot.gov | United States Maritime Administration |
| eagle.org | Abs, The American Bureau Of Shipping |
| asba.org | Association of Ship Brokers and Agents (U.S.A.), Inc |
| ampa.asn.au | Australian Marine Pilots Association |
| americanshipbuilding.com | The American Shipbuilding Association |
| acms-usa.com | Association of Certified Marine Surveyors |
| aapa-ports.org | American Association of Port Authorities |
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