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  2. 5-inch/38-caliber gun - Wikipedia

    en.wikipedia.org/wiki/5-inch/38-caliber_gun

    The Mark 12 5"/38-caliber gun was a United States dual-purpose naval gun, but also installed in single-purpose mounts on a handful of ships.The 38-caliber barrel was a mid-length compromise between the previous United States standard 5"/51 low-angle gun and 5"/25 anti-aircraft gun.

  3. Mk 12 Special Purpose Rifle - Wikipedia

    en.wikipedia.org/wiki/Mk_12_Special_Purpose_Rifle

    The United States Navy Mk 12 MOD 0/1/H Special Purpose Rifle (SPR) is a designated marksman rifle that was in service with United States Special Operations Forces in the designated marksman role until 2017, also designed to be shorter than standard weapons.

  4. Mark 12 - Wikipedia

    en.wikipedia.org/wiki/Mark_12

    Mark 12 is the twelfth chapter of the Gospel of Mark in the New Testament of the Christian Bible.It continues Jesus' teaching in the Temple in Jerusalem, and contains the parable of the Wicked Husbandmen, Jesus' argument with the Pharisees and Herodians over paying taxes to Caesar, and the debate with the Sadducees about the nature of people who will be resurrected at the end of time.

  5. Diving helmet - Wikipedia

    en.wikipedia.org/wiki/Diving_helmet

    Miller-Dunn Diving Co. of Miami, Florida, manufactured standard diving helmets and shallow water helmets. [71] Morse Diving of Boston, Massachusetts, also known as Morse Diving International and A J Morse and Son, manufactured standard diving helmets, [72] the US Navy Mark 12 deep water helmet, [33] and shallow water helmets. [73]

  6. Ship gun fire-control system - Wikipedia

    en.wikipedia.org/wiki/Ship_gun_fire-control_system

    Mark 37 Director c1944 with Mark 12 (rectangular antenna) and Mark 22 "orange peel" Ship gun fire-control systems (GFCS) are analogue fire-control systems that were used aboard naval warships prior to modern electronic computerized systems, to control targeting of guns against surface ships, aircraft, and shore targets, with either optical or radar sighting.

  7. List of proofreader's marks - Wikipedia

    en.wikipedia.org/wiki/List_of_proofreader's_marks

    This article is a list of standard proofreader's marks used to indicate and correct problems in a text. Marks come in two varieties, abbreviations and abstract symbols. Marks come in two varieties, abbreviations and abstract symbols.

  8. IFF Mark X - Wikipedia

    en.wikipedia.org/wiki/IFF_Mark_X

    IFF Mark X was the NATO standard military identification friend or foe transponder system from the early 1950s until it was slowly replaced by the IFF Mark XII in the 1970s. It was also adopted by ICAO, with some modifications, as the civilian air traffic control (ATC) secondary radar (SSR) transponder.

  9. Mark 12 nuclear bomb - Wikipedia

    en.wikipedia.org/wiki/Mark_12_nuclear_bomb

    Mark-12 nuclear bomb. The Mark-12 nuclear bomb was a lightweight nuclear bomb designed and manufactured by the United States which was built starting in 1954 and which saw service from then until 1962. The Mark-12 was notable for being significantly smaller in both size and weight compared to prior implosion-type nuclear weapons. For example ...