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| | Submarine Plans |
 | | The Hunley took part in the civil war and was the first submarine ever that sunk an enemy vessel on February 17th, 1864. |
 | | Dutch Zwaardvis class, 1966 (NL) [Nederlandse Vereniging voor Modelbouwers]. |
 | | Richard Knowles Morris, 1998, 'John P. Holland, Inventor of the Modern Submarine, University of South Carolina Press, ISBN 1-57003-236-X. Kohln F. and A. Niestle, 1997, Vom Original zum Modell: Uboottyp VIIC, Bernard and Graefe Verlag, Bonn, ISBN 3-7637-6002-4. |
| www.heiszwolf.com /subs/plans/plans.html (1352 words) |
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