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  2. I-400-class submarine - Wikipedia

    en.wikipedia.org/wiki/I-400-class_submarine

    Because of their large aircraft hangars and conning tower, all I-400-class boats had significant visual and radar signatures on the surface, and could be detected by aircraft relatively easily. Dive time was 56 seconds, nearly double that of U.S. fleet subs, which made the boats easier to destroy from the air when caught on the surface. [19]

  3. Type XXI submarine - Wikipedia

    en.wikipedia.org/wiki/Type_XXI_submarine

    The four boats assigned by Potsdam were used in trials and tests until 1955, then scuttled or used for weapon testing between 1958 and 1973. The Type XXI design formed the basis for several Soviet design projects, Projects 611, 613, 614, 633, and 644.

  4. Cog (ship) - Wikipedia

    en.wikipedia.org/wiki/Cog_(ship)

    A replica of the Bremen cog. A cog is a type of ship that was used during the Middle Ages, mostly for trade and transport but also in war.It first appeared in the 10th century, and was widely used from around the 12th century onward.

  5. Cape-class patrol boat - Wikipedia

    en.wikipedia.org/wiki/Cape-class_patrol_boat

    The Bay class was due to be replaced in 2010, but it was not until June of that year that a request for tender was issued for eight new, larger patrol boats. [5] [6] Austal was awarded the tender for eight patrol boats on 12 August 2011. [7]

  6. Ship model - Wikipedia

    en.wikipedia.org/wiki/Ship_model

    Ancient ship and boat models have been discovered throughout the Mediterranean, especially from ancient Greece, Egypt, and Phoenicia.These models provide archaeologists with valuable information regarding seafaring technology and the sociological and economic importance of seafaring.

  7. HMAS Armidale (ACPB 83) - Wikipedia

    en.wikipedia.org/wiki/HMAS_Armidale_(ACPB_83)

    The Armidale-class patrol boats are 56.8 metres (186 ft) long, with a beam of 9.7 metres (32 ft), a draught of 2.7 metres (8 ft 10 in), and a standard displacement of 270 tons. [1] The semi-displacement vee hull is fabricated from aluminium alloy, and each vessel is built to a combination of Det Norske Veritas standards for high-speed light ...

  8. Sea Fighter - Wikipedia

    en.wikipedia.org/wiki/Sea_Fighter

    A helicopter lands on Sea Fighter underway. Sea Fighter ' s hull is a small-waterplane-area twin hull (SWATH) design, constructed out of aluminum.. With twin gas turbine engines, quad water jets, and streamlined hulls, Sea Fighter is capable of speeds of 50 knots (90 km/h) and greater.

  9. Boat - Wikipedia

    en.wikipedia.org/wiki/Boat

    A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size or capacity, its shape, or its ability to carry boats. Small boats are typically used on inland waterways such as rivers and lakes , or in protected coastal areas.