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  2. Next-Generation Offshore Patrol Vessel program - Wikipedia

    en.wikipedia.org/wiki/Next-Generation_Offshore...

    The vessels each displace 1,920 long tons (1,950 t) while measuring about 95 m (311 ft 8 in) in length and 12 m (39 ft 4 in) in width. [ 1 ] [ 2 ] The OPV will use the UNIted COmbined Radio aNtenna (UNICORN) NORA-50 integration mast, which has a bar-shaped dome that houses the antennas for tactical data link, Tactical Air Navigation System ...

  3. Naval Radio Transmitter Facility Aguada - Wikipedia

    en.wikipedia.org/wiki/Naval_Radio_Transmitter...

    Naval Radio Transmitter Facility Aguada is a tall guyed radio mast erected by the United States Navy.It is used as a facility of the US Navy for ashore and U.S. and NATO ships, planes, and submarines operating at sea in areas of broadcast coverage near Aguada, Puerto Rico at by using radio waves in the very low frequency

  4. Guyed mast - Wikipedia

    en.wikipedia.org/wiki/Guyed_mast

    Guyed masts are frequently used for radio masts and towers. The mast can either support radio antennas (for VHF, UHF and other microwave bands) mounted at its top, or the entire structure itself can function as a mast radiator antenna (for VLF, LF, MF). In the latter case, the mast needs to be insulated from the ground. Guyed radio masts are ...

  5. Skipjack (boat) - Wikipedia

    en.wikipedia.org/wiki/Skipjack_(boat)

    A typical skipjack is 40 to 50 feet in length. The boats use direct link Edson worm steering gear mounted immediately forward of the transom. The dredge windlass and its motor are mounted amidships, between the mast and deckhouse. Rollers and bumpers are mounted on either side of the boat to guide the dredge line and protect the hull.

  6. Umbrella antenna - Wikipedia

    en.wikipedia.org/wiki/Umbrella_antenna

    The antenna must be very large at the VLF frequencies used; the supporting masts are 250–300 metres (820–980 ft) high, and the topload is about 1,900 metres (6,200 ft) in diameter. The trideco antenna was developed for high power naval transmitters, which transmit on frequencies between 15 and 30 kHz at powers up to 2 megawatts, to ...

  7. List of Marconi wireless stations - Wikipedia

    en.wikipedia.org/wiki/List_of_Marconi_wireless...

    One mast, number 13, collapsed during construction. It was rebuilt and reassigned as mast 17. A double antenna tuning inductor house near the summit of Cefn Du and to the rear of the 1914 antenna, served to tune the antenna and earth screens of what were now two parts of a whole antenna, fed at the western transmitter building.

  8. Thunderbird 26 - Wikipedia

    en.wikipedia.org/wiki/Thunderbird_26

    The 37 ft (11 m) mast, 13.50-foot (4.11 m) boom and 8-foot (2.44 m) spinnaker pole can be built of wood, but most boatbuilders and owners now choose ready-made aluminum spars from a source that meets ITCA specifications, for low maintenance and high performance.

  9. VLF Transmitter Cutler - Wikipedia

    en.wikipedia.org/wiki/VLF_Transmitter_Cutler

    The central tower of each antenna system is 304 m (997.4 ft) tall. It is surrounded by six 266.7 m (875 ft) tall masts, placed on a ring with a radius of 556 m around the central tower. The remaining six towers of the array are 243.5 m (799 ft) tall, placed on a circle of 935.7 m (3,070 ft) around the central tower.

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