small-waterplane-area twin hull

A small-waterplane-area twin hull, better known by the acronym SWATH, is a catamaran design that minimizes hull cross section area at the sea's surface. Minimizing the ship's volume near the surface area of the sea, where wave energy is located, minimizes a vessel's response to sea state, even in high seas and at high speeds. The bulk of the displacement necessary to keep the ship afloat is located beneath the waves, where it is less affected by wave action. Wave excitation drops exponentially as depth increases, so wave action normally does not affect a submerged submarine at all. Placing the majority of a ship's displacement under the waves is similar in concept to creating a ship that rides atop twin submarines.

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Wikimedia, Wikidata
SWATH; Small Waterplane Area Twin Hull
ship type, 

Skrunda-class patrol boat, 

​ ​

Location: KML, Cluster Map, Maps,

• 

  Skrunda-class patrol boat ⓘ
  SWATH patrol vessels of the Latvian Navy

Frameless

The Sea Shadow-HAER Photograph

DN-SC-86-04714 - CGH-67

428-GX-KN-31380 (24463970746)

SWATH in Riga (exterior)

Type	Subtype	Date	Description	Notes	Source
class	watercraft		Skrunda-class patrol boat	small-waterplane-area twin hull, patrol vessel	Wikidata
commons	image		The Sea Shadow-HAER Photograph		Commons
commons	image		DN-SC-86-04714 - CGH-67		Commons
commons	image		428-GX-KN-31380 (24463970746)		Commons
commons	image		SWATH in Riga (exterior)		Commons