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:''"Sea Shadow" redirects here. For the 2011 Emirati film, see [[Sea Shadow (film)]].''
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:''"Sea Shadow" redirects here. For the 2011 Emirati film, see film.''{{Infobox ship
{|{{Infobox ship begin}}
 
{{Infobox ship image
 
 
|Ship image= [[File:US Navy Sea Shadow stealth craft.jpg|300px|border|Sea Shadow]]
 
|Ship image= [[File:US Navy Sea Shadow stealth craft.jpg|300px|border|Sea Shadow]]
 
|Ship caption=
 
|Ship caption=
  +
|module={{Infobox ship career|embed=yes
}}
 
{{Infobox Ship Career
 
|Hide header=
 
 
|Ship country=U.S.
 
|Ship country=U.S.
|Ship flag=[[File:Flag_of_the_United_States_Navy.png|60px|USN flag]]
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|Ship flag=[[File:Flag of the United States Navy.png|60px|USN flag]]
 
|Ship name= ''Sea Shadow''
 
|Ship name= ''Sea Shadow''
|Ship namesake=
 
 
|Ship awarded=22 October 1982
 
|Ship awarded=22 October 1982
 
|Ship builder=Lockheed
 
|Ship builder=Lockheed
|Ship laid down=
 
 
|Ship completed=1984
 
|Ship completed=1984
 
|Ship acquired=1 March 1985
 
|Ship acquired=1 March 1985
|Ship commissioned=
 
|Ship decommissioned=
 
|Ship in service=
 
 
|Ship out of service=September 2006
 
|Ship out of service=September 2006
 
|Ship struck=September 2006
 
|Ship struck=September 2006
|Ship fate=
 
 
|Ship status=Sold for scrap
 
|Ship status=Sold for scrap
|Ship notes=
 
 
}}
 
}}
{{Infobox ship characteristics
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|module2={{Infobox ship characteristics|embed=yes
|Hide header=
 
|Header caption=
 
 
|Ship type= [[Stealth ship]]
 
|Ship type= [[Stealth ship]]
|Ship displacement={{convert|563|LT|t|0|lk=in|abbr=on}}
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|Ship displacement={{convert|563|LT|t|0|lk=off|abbr=on}}
 
|Ship length={{convert|164|ft|m|abbr=on}}
 
|Ship length={{convert|164|ft|m|abbr=on}}
 
|Ship beam={{convert|68|ft|m|abbr=on}}
 
|Ship beam={{convert|68|ft|m|abbr=on}}
 
|Ship draft={{convert|15|ft|m|abbr=on}}
 
|Ship draft={{convert|15|ft|m|abbr=on}}
|Ship depth=
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|Ship propulsion= Diesel-electric
 
|Ship speed={{convert|14.2|kn|lk=off}}
|Ship hold depth=
 
|Ship propulsion= [[Diesel-electric]]
 
|Ship speed={{convert|14.2|kn|lk=in}}
 
|Ship range=
 
 
|Ship complement=4
 
|Ship complement=4
 
|Ship armament=None
 
|Ship armament=None
|Ship armor=
 
|Ship notes=
 
 
}}
 
}}
|}
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}}
   
'''''Sea Shadow'' (IX-529)''' was an experimental [[stealth ship]] built by [[Lockheed Corporation|Lockheed]] for the [[United States Navy]] to determine how a low radar profile might be achieved and to test high stability hull configurations which have been used in oceanographic ships.
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'''''Sea Shadow'' (IX-529)''' was an experimental [[stealth ship]] built by Lockheed for the [[United States Navy]] to determine how a low radar profile might be achieved and to test high stability hull configurations which have been used in oceanographic ships.
   
 
==Development==
 
==Development==
''Sea Shadow'' was built in 1984 to examine the application of [[stealth technology]] on naval vessels. She was used in secret until a public debut in 1993. In addition, the ship was designed to test the use of automation to enable the reduction of crew size. The ship was created by the [[Defense Advanced Research Projects Agency]] (DARPA), the U.S. Navy and [[Lockheed Corporation|Lockheed]]. ''Sea Shadow'' was developed at Lockheed's [[Redwood City]], California, facility, inside the [[Hughes Mining Barge]] (HMB-1), which functioned as a floating [[drydock]] during construction and testing.<ref name="WSJ"/>
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''Sea Shadow'' was built in 1984 to examine the application of [[stealth technology]] on naval vessels. She was used in secret until a public debut in 1993. In addition, the ship was designed to test the use of automation to enable the reduction of crew size. The ship was created by the [[Defense Advanced Research Projects Agency]] (DARPA), the U.S. Navy and Lockheed. ''Sea Shadow'' was developed at Lockheed's [[Redwood City]], California, facility, inside the [[Hughes Mining Barge]] (HMB-1), which functioned as a floating drydock during construction and testing.<ref name="WSJ"/>
   
 
==Overview==
 
==Overview==
''Sea Shadow'' had a [[Small waterplane area twin hull|SWATH]] hull design. Below the water were submerged twin hulls, each with a propeller, aft stabilizer, and inboard [[hydrofoil]]. The portion of the ship above water was connected to the hulls via the two angled struts. The SWATH design helped the ship remain stable even in very rough water of up to [[sea state]] 6 (wave height of 18&nbsp;feet (5.5&nbsp;m) or "very rough" sea). The shape of the superstructure was sometimes compared to the [[casemate]] of the ironclad ram {{ship|CSS|Virginia||6}} of the [[American Civil War]].<ref name="WSJ"/>
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''Sea Shadow'' had a [[Small waterplane area twin hull|SWATH]] hull design. Below the water were submerged twin hulls, each with a propeller, aft stabilizer, and inboard hydrofoil. The portion of the ship above water was connected to the hulls via the two angled struts. The SWATH design helped the ship remain stable even in very rough water of up to [[sea state]] 6 (wave height of 18&nbsp;feet (5.5&nbsp;m) or "very rough" sea). The shape of the superstructure was sometimes compared to the [[casemate]] of the ironclad ram {{ship|CSS|Virginia||6}} of the [[American Civil War]].<ref name="WSJ"/>
 
''Sea Shadow'' was built in Redwood City,California.
 
''Sea Shadow'' was built in Redwood City,California.
   
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''Sea Shadow'' had only 12 bunks aboard, one small microwave oven, a refrigerator and table. She was never intended to be mission capable and was never commissioned, although she is listed in the [[Naval Vessel Register]].
 
''Sea Shadow'' had only 12 bunks aboard, one small microwave oven, a refrigerator and table. She was never intended to be mission capable and was never commissioned, although she is listed in the [[Naval Vessel Register]].
   
''Sea Shadow'' was revealed to the public in 1993, and was housed at the [[San Diego Naval Station]] until September 2006, when she was relocated with the [[Hughes Mining Barge]] to the [[National Defense Reserve Fleet|Suisun Bay Reserve Fleet]] in [[Benicia, California]]. Until 2006, ''Sea Shadow'' and the HMB-1 were maintained and operated by [[Lockheed Martin]] for the U. S. Navy. The vessels were available for donation to a maritime museum.<ref name="WSJ"/>
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''Sea Shadow'' was revealed to the public in 1993, and was housed at the [[San Diego Naval Station]] until September 2006, when she was relocated with the [[Hughes Mining Barge]] to the [[National Defense Reserve Fleet|Suisun Bay Reserve Fleet]] in Benicia, California. Until 2006, ''Sea Shadow'' and the HMB-1 were maintained and operated by Lockheed Martin for the U. S. Navy. The vessels were available for donation to a maritime museum.<ref name="WSJ"/>
   
In 2006, the U.S Navy began to try to sell ''Sea Shadow'' to the highest bidder;<ref name="WSJ">{{cite news|journal=Wall Street Journal|date=February 24, 2009|page=1|title=The Navy has a Top-Secret Vessel it wants to put on display; Sea Shadow and its Satellite-Proof Barge need a home; Plotting in Providence|first=Barry|last=Newman}}</ref><ref>{{cite news| url=http://www.foxnews.com/story/0,2933,499089,00.html | work=Fox News | title=Top-Secret Navy Vessel Needs a Home | date=2009-02-24}}</ref> after the initial offering met with a lack of interest, it was listed for dismantling sale on gsaauctions.gov.<ref>{{Cite web |title=BID DEPOSIT-SEA SHADOW/HMB-1 |url=http://gsaauctions.gov/gsaauctions/aucdsclnk?sl=31QSCI12129001# |publisher=General Services Administration }}</ref> The U.S. Government required that the buyer not sail the ship and is required to scrap the ship.<ref>{{cite news| url=http://www.thesun.co.uk/sol/homepage/news/4288766/Top-secret-US-Navy-stealth-ship-goes-on-sale-on-auction-site.html | location=London | work=The Sun | title=Top-secret US Navy stealth ship goes on sale on auction site – The Sun –News}}</ref> The ship was finally sold in 2012.<ref>Time Magazine, May 11, 2012, p. 5</ref><ref>{{cite news| url=http://www.sacbee.com/2012/07/06/4614558/innovative-stealth-ship-sold-to.html | work=The Sacramento Bee | title=Innovative stealth ship sold to Alameda firm for scrap | date=2012-07-06}}</ref> ''Sea Shadow'' was totally dismantled in 2012 by Bay Ship. <ref>http://www.mercurynews.com/ci_22320385/now-tons-scrap-sunnyvale-lockheed-facilitys-sea-shadow</ref>
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In 2006, the U.S Navy began to try to sell ''Sea Shadow'' to the highest bidder;<ref name="WSJ">{{cite news|journal=Wall Street Journal|date=February 24, 2009|page=1|title=The Navy has a Top-Secret Vessel it wants to put on display; Sea Shadow and its Satellite-Proof Barge need a home; Plotting in Providence|first=Barry|last=Newman}}</ref><ref>{{cite news| url=http://www.foxnews.com/story/0,2933,499089,00.html | work=Fox News | title=Top-Secret Navy Vessel Needs a Home | date=2009-02-24}}</ref> after the initial offering met with a lack of interest, it was listed for dismantling sale on gsaauctions.gov.<ref>{{Cite web |title=BID DEPOSIT-SEA SHADOW/HMB-1 |url=http://gsaauctions.gov/gsaauctions/aucdsclnk?sl=31QSCI12129001# |publisher=General Services Administration}}</ref> The U.S. Government required that the buyer not sail the ship and is required to scrap the ship.<ref>{{cite news| url=http://www.thesun.co.uk/sol/homepage/news/4288766/Top-secret-US-Navy-stealth-ship-goes-on-sale-on-auction-site.html | location=London | work=The Sun | title=Top-secret US Navy stealth ship goes on sale on auction site – The Sun –News}}</ref> The ship was finally sold in 2012.<ref>Time Magazine, May 11, 2012, p. 5</ref><ref>{{cite news| url=http://www.sacbee.com/2012/07/06/4614558/innovative-stealth-ship-sold-to.html | work=The Sacramento Bee | title=Innovative stealth ship sold to Alameda firm for scrap | date=2012-07-06}}</ref> ''Sea Shadow'' was totally dismantled in 2012 by Bay Ship.<ref>http://www.mercurynews.com/ci_22320385/now-tons-scrap-sunnyvale-lockheed-facilitys-sea-shadow</ref>
   
== See also ==
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==See also==
 
* [[Skjold-class patrol boat]], the worlds fastest stealth missile coastal corvette in service with the [[Royal Norwegian Navy]]
 
* [[Skjold-class patrol boat]], the worlds fastest stealth missile coastal corvette in service with the [[Royal Norwegian Navy]]
 
* [[Visby class corvette]], a successful stealth ship currently in service within the [[Swedish Navy]]
 
* [[Visby class corvette]], a successful stealth ship currently in service within the [[Swedish Navy]]
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==External links==
 
==External links==
{{Commons category|Sea Shadow (IX-529)}}
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{{Commons|Sea Shadow (IX-529)}}
 
*[http://www.navy.mil/search/display.asp?story_id=11028 Navy news article]
 
*[http://www.navy.mil/search/display.asp?story_id=11028 Navy news article]
 
*[http://www.fas.org/man/dod-101/sys/ship/sea_shadow.htm ''Sea Shadow'']
 
*[http://www.fas.org/man/dod-101/sys/ship/sea_shadow.htm ''Sea Shadow'']
*[http://online.wsj.com/article/SB123543023154353525.html?mod=djemWMP "The Navy Has a Top-Secret Vessel It Wants to Put on Display"] by Barry Newman - ''[[Wall Street Journal]]'' - February 24, 2009
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*[http://online.wsj.com/article/SB123543023154353525.html?mod=djemWMP "The Navy Has a Top-Secret Vessel It Wants to Put on Display"] by Barry Newman - ''Wall Street Journal'' - February 24, 2009
 
*[http://hnsa.org/seashadow HNSA Virtual Tour of Sea Shadow and HMB-1]
 
*[http://hnsa.org/seashadow HNSA Virtual Tour of Sea Shadow and HMB-1]
   
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{{DISPLAYTITLE:''Sea Shadow'' (IX-529)}}
 
{{DISPLAYTITLE:''Sea Shadow'' (IX-529)}}
   
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{{Wikipedia|Sea Shadow (IX-529)}}
 
[[Category:Experimental ships of the United States Navy|Sea Shadow]]
 
[[Category:Experimental ships of the United States Navy|Sea Shadow]]
 
[[Category:Lockheed Martin]]
 
[[Category:Lockheed Martin]]
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[[Category:1985 ships]]
 
[[Category:1985 ships]]
 
[[Category:High speed vessels of the United States Navy]]
 
[[Category:High speed vessels of the United States Navy]]
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[[Category:Stealth ships]]
 
  +
[[Category:Ships built by Lockheed Shipbuilding and Construction Company]]
{{Link GA|de}}
 
  +
[[Category:Catamarans of the United States Navy]]
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[[Category:Military catamarans]]

Latest revision as of 15:18, 19 September 2020

"Sea Shadow" redirects here. For the 2011 Emirati film, see film.
Sea Shadow (IX-529)
Sea Shadow
Career (U.S.) USN flag
Name: Sea Shadow
Awarded: 22 October 1982
Builder: Lockheed
Completed: 1984
Acquired: 1 March 1985
Out of service: September 2006
Struck: September 2006
Status: Sold for scrap
General characteristics
Type: Stealth ship
Displacement: 563 long tons (572 t)
Length: 164 ft (50 m)
Beam: 68 ft (21 m)
Draft: 15 ft (4.6 m)
Propulsion: Diesel-electric
Speed: 14.2 knots (26.3 km/h; 16.3 mph)
Complement: 4
Armament: None

Sea Shadow (IX-529) was an experimental stealth ship built by Lockheed for the United States Navy to determine how a low radar profile might be achieved and to test high stability hull configurations which have been used in oceanographic ships.

Development

Sea Shadow was built in 1984 to examine the application of stealth technology on naval vessels. She was used in secret until a public debut in 1993. In addition, the ship was designed to test the use of automation to enable the reduction of crew size. The ship was created by the Defense Advanced Research Projects Agency (DARPA), the U.S. Navy and Lockheed. Sea Shadow was developed at Lockheed's Redwood City, California, facility, inside the Hughes Mining Barge (HMB-1), which functioned as a floating drydock during construction and testing.[1]

Overview

Sea Shadow had a SWATH hull design. Below the water were submerged twin hulls, each with a propeller, aft stabilizer, and inboard hydrofoil. The portion of the ship above water was connected to the hulls via the two angled struts. The SWATH design helped the ship remain stable even in very rough water of up to sea state 6 (wave height of 18 feet (5.5 m) or "very rough" sea). The shape of the superstructure was sometimes compared to the casemate of the ironclad ram CSS Virginia of the American Civil War.[1] Sea Shadow was built in Redwood City,California.

The T-AGOS 19-and-23-class oceanographic ships have inherited the stabilizer and canard method to help perform their stability-sensitive surveillance missions.[1]

Sea Shadow had only 12 bunks aboard, one small microwave oven, a refrigerator and table. She was never intended to be mission capable and was never commissioned, although she is listed in the Naval Vessel Register.

Sea Shadow was revealed to the public in 1993, and was housed at the San Diego Naval Station until September 2006, when she was relocated with the Hughes Mining Barge to the Suisun Bay Reserve Fleet in Benicia, California. Until 2006, Sea Shadow and the HMB-1 were maintained and operated by Lockheed Martin for the U. S. Navy. The vessels were available for donation to a maritime museum.[1]

In 2006, the U.S Navy began to try to sell Sea Shadow to the highest bidder;[1][2] after the initial offering met with a lack of interest, it was listed for dismantling sale on gsaauctions.gov.[3] The U.S. Government required that the buyer not sail the ship and is required to scrap the ship.[4] The ship was finally sold in 2012.[5][6] Sea Shadow was totally dismantled in 2012 by Bay Ship.[7]

See also

References

This article includes information collected from the Naval Vessel Register, which, as a U.S. government publication, is in the public domain. The entry can be found here.

External links

Coordinates: 38°4′9.33″N 122°6′5.22″W / 38.0692583°N 122.10145°W / 38.0692583; -122.10145


All or a portion of this article consists of text from Wikipedia, and is therefore Creative Commons Licensed under GFDL.
The original article can be found at Sea Shadow (IX-529) and the edit history here.