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A stealth ship is a ship which employs stealth technology construction techniques in an effort to ensure that it is harder to detect by one or more of radar, visual, sonar, and infrared methods. These techniques borrow from stealth aircraft technology, although some aspects such as wake and acoustic signature reduction (Acoustic quieting) are unique to stealth ships' design. Reduction of radar cross-section (RCS), visibility and noise is not unique to stealth ships; visual masking has been employed for over two centuries and RCS reduction traces back to American and Soviet ships of the Cold War. One common feature is the inward-sloping tumblehome hull design that significantly reduces the RCS. ==Examples== Several surface vessels employ stealth technology, amongst them the Russian ''Admiral Gorshkov''-class frigate, the Swedish ''Visby''-class corvette, the Dutch ''Zeven Provinciën''-class frigate, the Turkish MİLGEM corvette, the Norwegian ''Skjold''-class patrol boat, the French ''La Fayette''-class frigate, the Chinese PLA Navy's Type 022 missile boat, Type 054A frigate, Type 056 corvette, the spanish ''Álvaro de Bazán''-class frigate,Type 052C destroyer, Type 052D destroyer, and Type 055 destroyer, the German MEKO ships ''Braunschweig''-class corvettes and ''Sachsen''-class frigates, the Indian ''Shivalik''-class frigate, ''Kolkata''-class destroyer, Kamorta-class corvette, the Singaporean ''Formidable''-class frigate, the British Type 45 destroyer, the U.S. Navy's ''Zumwalt''-class destroyer, Finnish ''Hamina''-class missile boats, Chilean Patrol Vessel PZM based on the German OPV80 and Indonesian 63m Stealth Fast Missile Patrol Vessel. Egypt has Ambassador MK III missile boat. File:K32 HMS Helsingborg Anchored-of-Gotska-Sandoen cropped.jpg|HMS ''Helsingborg'', one of the Swedish Navy's ''Visby''-class corvettes Image:FS Surcouf.jpg|French frigate ''Surcouf'' of the ''La Fayette'' class File:F805 Evertsen.jpg|Dutch frigate ''Evertsen'' of the ''Zeven Provinciën'' class File:Shivalik Maiden Sortie.jpg|Indian stealth frigate INS ''Shivalik'', lead ship of her class ''Visby'' is designed to elude visual detection, radar detection, acoustic detection, and infrared detection. The hull material is a sandwich construction comprising a PVC core with a carbon fibre and vinyl laminate. Avoidance of right angles in the design results in a smaller radar signature, reducing the ship's detection range. Britain's Type 45 anti-air warfare destroyer has similarities to the ''Visby'' class, but is much more conventional, employing traditional steel instead of carbon fibre. Like ''Visby'', its design reduces the use of right angles. ''Sea Shadow'', which utilizes both tumblehome and SWATH features, was an early U.S. exploration of stealth ship technology. The currently developed U.S. ''Zumwalt''-class destroyer — or DD(X) — is the US version of a stealth ship. Despite being 40% larger than an ''Arleigh Burke''-class destroyer the radar signature is more akin to a fishing boat, according to a spokesman for Naval Sea Systems Command; sound levels are compared to the s. The tumblehome hull reduces radar return and the composite material deckhouse also has a low radar return. Water sleeting along the sides, along with passive cool air induction in the mack reduces infrared signature.〔(【引用サイトリンク】title=DDG-1000 Zumwalt / DD(X) Multi-Mission Surface Combatant )〕 Overall, the destroyer's angular build makes it "50 times harder to spot on radar than an ordinary destroyer.〔 The ''Arleigh Burke''-class destroyer also employs stealth technology without being a full stealth ship, similar to the German designs. Image:MAGDEBURG 130-02 2008-03-04 03.jpg|German ''Braunschweig''-class corvette Image:HMSDaring.jpg|Type 45 Royal Navy destroyer File:Forbin-090531-N-9988F-406.jpg|''Horizon''-class frigate of the French Navy and Italian Navy ''Ady Gil'', operated by the Sea Shepherd Conservation Society, was painted with what the owners claimed to be radar-absorbent material. Thus, ''Ady Gil'' would have been a rare case of a non-military vessel employing stealth technology. The Indonesian X3K 63m stealth fast missile patrol vessel has a trimaran design with long, but small center hull and has been built from carbon composite materials.〔(【引用サイトリンク】title=KRI Klewang )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stealth ship」の詳細全文を読む スポンサード リンク
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