- Amistad America, Inc.
 - Promoting reconciliation and harmony among races through its operation of Freedom Schooner Amistad, a recreation of the original La Amistad. Site features events, crew opportunities, and extensive review of the Amistad story. - Great Lakes Center for Maritime Studies
- Research institution studying Great Lakes maritime history, culture, and ecology. Find out about current exhibits, projects, and education programs. From Western Michigan University.
- Navesink Maritime Heritage Association
- Nonprofit educational organization formed for the purpose of promoting appreciation and preservation of the Navesink River communities of New Jersey.
- Netherlands Cape Horn Sailors Foundation
- Dedicated to the history of seamanship, with an emphasis on Dutch maritime history and the voyages around Cape Horn.
- Polynesian Voyaging Society
- Investigates the means by which Polynesian seafarers discovered and settled nearly every inhabitable island in the Pacific Ocean. Includes the current status of the Hokulea.
- Project Liberty Ship
- Organization dedicated to the preservation of the Liberty Ship SS John W. Brown as a memorial to the men and women who built and sailed them.
- PT Boats, Inc.
- Nonprofit educational organization dedicated to preserving the history of patrol torpedo boats and their crews, tenders, and shore bases.
- Puget Sound Maritime Historical Society
- Collects, preserves, and displays maritime historical objects, relics, and data with particular emphasis on the Pacific Northwest.
- Ships of Discovery
- Research and educational organization studying ships of the earliest European explorations in the New World.
- World Ship Trust
- Advances the preservation and display of surviving historic ships that played a significant part in human history.
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