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  2. David Dunlap Observatory Catalogue - Wikipedia

    en.wikipedia.org/wiki/David_Dunlap_Observatory...

    DDO 3 (also known as NGC 147, PGC 2004, UGC 326, LEDA 2004 or Caldwell 17) is a dwarf spheroidal galaxy which is located in the northern constellation of Cassiopeia, near the border of Andromeda. It is a small satellite galaxy of the famous Messier 31 , which is the largest galaxy in the Local Group .

  3. Mark 38 25 mm machine gun system - Wikipedia

    en.wikipedia.org/wiki/Mark_38_25_mm_Machine_Gun...

    The surveillance system can move independently of the turret itself, intended to minimize attention drawn from targets. In addition to the 25 mm M242 Bushmaster, the Mod 3 can optionally mount a coaxial 7.62 mm Bushmaster Mark 52 chain gun, which has a ROF of 500–600 RPM. [4] [3] [10] [11]

  4. Wave pounding - Wikipedia

    en.wikipedia.org/wiki/Wave_pounding

    Wave pounding is the 'sledge hammer' effect of tonnes of water crashing against cliffs. It shakes and weakens the rocks leaving them open to attack from hydraulic action and abrasion. Eroded material gets carried away by the wave. Wave pounding is particularly fierce in a storm, where the waves are exceptionally large, and have a lot of energy ...

  5. DDO - Wikipedia

    en.wikipedia.org/wiki/DDO

    DDO (gene), that encodes the D-aspartate oxidase enzyme Distant detached objects , class of minor planets in the outer reaches of the Solar System Dynamic Drive Overlay , a software technique to extend a system BIOS

  6. 30mm DS30M Mark 2 Automated Small Calibre Gun - Wikipedia

    en.wikipedia.org/wiki/30mm_DS30M_Mark_2...

    The 30mm DS30M Mark 2 is a ship-protection system made by MSI-Defence Systems consisting of a 30mm Mark 44 Bushmaster II cannon on an automated mount. It was designed to defend Royal Navy frigates from fast inshore attack craft armed with short-range missiles, rocket-propelled grenades , machine guns , or explosives.

  7. Gate guardian - Wikipedia

    en.wikipedia.org/wiki/Gate_guardian

    F-104 at the Georgia Air National Guard. A gate guardian or gate guard is a withdrawn piece of equipment, often an aircraft, armoured vehicle, artillery piece, or locomotive, mounted on a plinth and used as a static display near to and forming a symbolic display of "guarding" the main entrance to a site, especially a military base.

  8. Waveguide (optics) - Wikipedia

    en.wikipedia.org/wiki/Waveguide_(optics)

    The slab waveguide is essentially a one-dimensional waveguide. It traps light only normal to the dielectric interfaces. For guided modes, the field in domain II in the diagram is propagating and can be treated as a plane wave. The field in domains I and III evanescently decay away from the slab.

  9. Guard Mount - Wikipedia

    en.wikipedia.org/wiki/Guard_Mount

    Guard mount is a pre-shift official formation among designated United States Air Force Security Forces or United States Army Military Police Corps members. This meeting is usually held after all security personnel have "armed up" or received their weapons and equipment for the shift.