- See also
The list of ship commissionings in 1909 includes a chronological list of all ships commissioned in 1909. | Operator | Ship | Flag | Class and type | Pennant | Other notes |
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| 9 February | UK}} | {{HMS>Defence|1907|2}} | Minotaur|cruiser (1906)|0}} cruiser |
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| 16 June | USA}} | {{USS>Lamson|DD-18|2}} | Smith|destroyer|2}} | DD-18 |
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| 10 July | German Empire}} | {{SMS>Emden|1906|2}} | Dresden|cruiser|2}} |
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| 1 October | German Empire}} | {{SMS>Nassau | 2} | Nassau|battleship|2}} |
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| 28 October | USA}} | {{USS>Flusser|DD-20|2}} | Smith|destroyer|2}} | DD-20 |
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| 16 November | German Empire}} | {{SMS>Westfalen | 2} | Nassau|battleship|2}} |
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| 23 November | USA}} | {{USS>Stingray|SS-13|2}} | C-class submarine | SS-13 | renamed C-2 in 1911 |
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| 23 November | USA}} | {{USS>Tarpon|SS-14|2}} | C-class submarine | SS-14 | renamed C-3 in 1911 |
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| 23 November | USA}} | {{USS>Bonita|SS-15|2}} | C-class submarine | SS-15 | renamed C-4 in 1911 |
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| 23 November | USA}} | {{USS>Narwhal|SS-17|2}} | D-class submarine | SS-17 | renamed D-1 in 1911 |
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| 23 November | USA}} | {{USS>Grayling|SS-18|2}} | D-class submarine | SS-18 | renamed D-2 in 1911 |
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| 26 November | USA}} | {{USS>Smith|DD-17|2}} | Smith|destroyer|2}} | DD-17 |
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| 3 December | USA}} | {{USS>Reid|DD-21|2}} | Smith|destroyer|2}} | DD-21 |
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| 21 December | USA}} | {{USS>Preston|DD-19|2}} | Smith|destroyer|2}} | DD-19 |
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See also {{shipevents|1909}}{{Expand list|date=August 2008}} 2 : Lists of ship commissionings|1909 ships |