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  2. Sierra-class submarine - Wikipedia

    en.wikipedia.org/wiki/Sierra-class_submarine

    The Sierra class, Soviet designations Project 945 Barrakuda and Project 945A Kondor, (NATO reporting names Sierra I and Sierra II respectively), are a series of nuclear-powered attack submarines intended for the Soviet Navy and currently in service with the Russian Navy.

  3. International maritime signal flags - Wikipedia

    en.wikipedia.org/wiki/International_maritime...

    Gules, a cross or: No ICS meaning as single flag. Prior to 1969: "The way is off my ship; you may feel your way past me." Distance (range) in nautical miles. S Sierra: Argent, an inescutcheon azure "I am operating astern propulsion." [b] Speed (velocity) in knots T Tango: Tierced in pale gules, argent and azure "Keep clear of me." [b]

  4. Navigational instrument - Wikipedia

    en.wikipedia.org/wiki/Navigational_instrument

    Cross staff, an older instrument long out of use. Kamal Very simple instrument used primarily by Arabian navigators. It consists of a small board with a knotted piece of twine through the center. The observer holds one of the knots in his mouth and extends the board away so that the edges make a constant angle with his eyes.

  5. Ford small block engine - Wikipedia

    en.wikipedia.org/wiki/Ford_small_block_engine

    The marine industry's relationship with the 351W platform ended when Ford was unable or unwilling to compete with GM's production of TBI- and MPI-equipped engines in mass quantity. During that time, the recreational marine community's small-block V8 platform of choice shifted to the 350 cu in (5.7 L) Chevrolet L31 (Vortec 5700) engine series.

  6. Tycho-2 Catalogue - Wikipedia

    en.wikipedia.org/wiki/Tycho-2_Catalogue

    To enable rapid access of specific stars in the catalogue, WCSTools software numbers each star using its Guide Star region number (0001 to 9537) and a five-digit star number within each region, separated by a decimal point. sty2 lists Tycho-2 stars by number or sky region. imty2 lists the Tycho-2 stars within an IRAF or FITS image using the world coordinate system defined in its header.

  7. List of shipwrecks in February 1918 - Wikipedia

    en.wikipedia.org/wiki/List_of_shipwrecks_in...

    World War I - Action of 15 February 1918: The naval trawler was sunk in the Strait of Dover by a Kaiserliche Marine destroyer. Three of her crew survived. [102] [103] HMT James Pond Royal Navy: World War I - Action of 15 February 1918: The naval trawler was sunk in the Strait of Dover by a Kaiserliche Marine warship with the loss of three of ...