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  2. HAZMAT Class 6 Toxic and infectious substances - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_6_Toxic_and...

    Class 6: Toxic. Poison: 454 kg (1001 lb) or more gross weight of poisonous materials that are not in Hazard Zone A or B (see Assignment of packing groups and hazard zones below). For U.S. Domestic Use only. Inhalation Hazard: Any quantity of a material that is in Hazard Zone A or B (see Assignment of packing groups and hazard zones below).

  3. Balao-class submarine - Wikipedia

    en.wikipedia.org/wiki/Balao-class_submarine

    1 × 5-inch (127 mm) / 25 caliber deck gun [ 4] Bofors 40 mm and Oerlikon 20 mm cannon. The Balao class was a design of United States Navy submarine used during World War II, and with 120 [ 2] boats completed, the largest class of submarines in the United States Navy. An improvement on the earlier Gato class, the boats had slight internal ...

  4. Astute-class submarine - Wikipedia

    en.wikipedia.org/wiki/Astute-class_submarine

    The Astute class is the latest class of nuclear-powered fleet submarines in service with the Royal Navy. [2] The boats are being constructed by BAE Systems Submarines at Barrow-in-Furness . [ 6 ] Seven boats will be constructed: the first of class, Astute , was launched by Camilla, Duchess of Cornwall , in 2007, [ 7 ] commissioned in 2010, and ...

  5. Freedom-class littoral combat ship - Wikipedia

    en.wikipedia.org/wiki/Freedom-class_littoral...

    The Freedom class is one of two classes of the littoral combat ship program, built for the United States Navy. [20] The Freedom class was proposed by a consortium formed by Lockheed Martin as "prime contractor" and by Fincantieri (project) through the subsidiary Marinette Marine (manufacturer) as a contender for a fleet of small, multipurpose ...

  6. History of water supply and sanitation - Wikipedia

    en.wikipedia.org/wiki/History_of_water_supply...

    The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Astronaut Jack Lousma taking a shower in space, 1974.

  7. Original six frigates of the United States Navy - Wikipedia

    en.wikipedia.org/wiki/Original_six_frigates_of...

    USS Constitution, the last of the original six frigates of the United States Navy still in commission Class overview Operators United States Navy Built 1794–1800 In service 1794–1881 In commission 1797–present Planned 6 Completed 6 Active 1 Lost 2 Retired 3 General characteristics (Constitution, President, United States) Class and type 44-gun frigate Tonnage 1,576 Displacement 2,200 tons ...

  8. List of submarine classes of the United States Navy - Wikipedia

    en.wikipedia.org/wiki/List_of_submarine_classes...

    Submarines of the United States Navy are built in classes, using a single design for a number of boats. Minor variations occur as improvements are incorporated into the design, so later boats of a class may be more capable than earlier. Also, boats are modified, sometimes extensively, while in service, creating departures from the class standard.

  9. Columbia-class submarine - Wikipedia

    en.wikipedia.org/wiki/Columbia-class_submarine

    The cost to build District of Columbia, the lead boat of the class, will be an estimated $6.2 billion (fiscal 2010 dollars). [5] The Navy has a goal of reducing the average cost of the remaining 11 planned hulls in the class to $4.9 billion each (fiscal 2010 dollars). [19] The total lifecycle cost of the entire class is estimated at $347 ...

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