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London parking meter isolated over white background
Narita, Chiba prefecture, Tokyo, Japan: ramp central control tower at Narita International Airport (NRT), South Southwest side (on windows) - the tower has an earthquake-resistant structure for the tower body and a base-isolated structure for the upper floors - operated by a government agency, the Japan Air Navigation Service (JANS), the service provision branch of Civil Aviation Bureau of Japan (JCAB), Fukuoka Flight Information Region (FIR).
Flight instrumentation from an airplane control panel to control glide path and descent rate on an old autopilot
Communication and transmission tower for military use
Tornado siren against a blues sky with white clouds.
Close-up of right pitot and right ice detector measuring instrument outside of airplane at Zürich Kloten Airport on a summer day. Photo taken September 1st, 2023, Kloten, Canton Zürich, Switzerland.
Emergency siren pole.
Mobile phone communications tower
Antique electric meter with numbers in kwh for measuring the electricity consumed
A modern, compact mobile phone antennae in an urban pole, seen against clear blue sky.
Old-fashioned action selector
Close up of white loudspeakers
control pole with camera and megaphone
Mount Majura Trigonometrical Station - Canberra ACT
 Tornado Siren
Amateur radio Yagi antenna on tower with blue sky background
An old dial within the controls of a carillon device.
Ferragudo, Lagoa, Algarve / Faro District, Portugal: shore-side radar tower - mainland Portugal maritime traffic control system aka VTS (Vessel Traffic System), a maritime traffic monitoring system, similar to air traffic control, providing navigational safety in a geographical area. Ships entering a VTS area report to the authorities, usually by radio, and may be tracked by the VTS control centre. Coastline surveillance.
Antique radio transmitter in a war room in the basement of the Reunification Palace in Ho Chi Minh City (Saigon), Vietnam
Old diesel locomotive's control panel with analog meters
Loudspeakers on poles, loudspeakers, loudspeakers on blue sky background.
Close-up of volume unit meter in recording studio.
Vintage World War II siren alarm on a pole in Southern California.
Speakers and planes for emergency broadcasting
Pneumatic motor Siren, German E57, alarm for fire warning, natural disasters or attacks on a high pole that is also used for an antenna, light gray sky with copy space, selected focus
St. John's, Antigua island, Antigua and Barbuda: air traffic control in Antigua and Barbuda primarily centers on operations at V.C. Bird International Airport (ANU), the country's main international gateway. The Eastern Caribbean Civil Aviation Authority (ECCAA) oversees air navigation services for this small island nation, along with several other Eastern Caribbean states. A single control tower at ANU manages local traffic, while en-route control relies on a mix of radar and procedural methods due to limited radar coverage in the region. The airspace is generally less congested than in major metropolitan areas, reflecting the country's size and location in the Caribbean.
Old volt meter that goes up to 600 volts.
close up of tab keys on an antique and weathered adding machine, outdoors on display and for sale at a junkyard, Long Island, New York
Free Images: "bestof:Queensland State Archives 4778 Civil aviation noise detector May 1953.png en Civil aviation noise detector 1953-05 http //www archivessearch qld gov au/Image/..."
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