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  2. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...

  3. Distraction - Wikipedia

    en.wikipedia.org/wiki/Distraction

    Distraction is the process of diverting the attention of an individual or group from a desired area of focus and thereby blocking or diminishing the reception of desired information. Distraction is caused by: the lack of ability to pay attention; lack of interest in the object of attention; or the great intensity, novelty or attractiveness of ...

  4. United States military aircraft serial numbers - Wikipedia

    en.wikipedia.org/wiki/United_States_military...

    AF Serial Number 06-6161, a C-17A Globemaster III. In the United States, all military aircraft display a serial number to identify individual aircraft. These numbers are located on the aircraft tail, so they are sometimes referred to unofficially as "tail numbers". On the Northrop Grumman B-2 Spirit bomber, lacking a tail, the number appears on ...

  5. ARRL Numbered Radiogram - Wikipedia

    en.wikipedia.org/wiki/ARRL_Numbered_Radiogram

    ARRL Numbered Radiogram. An ARRL Numbered Radiogram is a brevity code used in composing ARRL Radiograms during times of radio congestion. The code is used to transmit standard messages, sometimes with customized text, very quickly by experienced ARRL National Traffic System (NTS) message traffic handlers. In use, ARRL Numbered Radiograms are ...

  6. Common Language Information Services - Wikipedia

    en.wikipedia.org/wiki/Common_Language...

    CLEI Codes. Common Language Equipment Identifier or CLEI code is an industry standard, globally unique identifier for telecommunications equipment with a uniform feature-oriented classification. CLEI codes may be acquired by telecommunications equipment manufacturers and assigned to devices before they are sold to a licensed service provider.

  7. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    Investigations. The following investigations are used in clearance determinations: [12] ANACI (Access National Agency Check with Inquiries) – Initial Confidential, Secret, L, LX; only used for civilian employees. NACLC (National Agency Check with Law and Credit) – Initial Confidential, Secret, L, LX; reinvestigations.

  8. List of aircraft type designators - Wikipedia

    en.wikipedia.org/wiki/List_of_aircraft_type...

    IATA codes are published in Appendix A of IATA's annual Standard Schedules Information Manual (SSIM) and are used for airline timetables and computer reservation systems. IATA designators are used to distinguish between aircraft types and variants that have differences from an airline commercial perspective (size, role, interior configuration ...

  9. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    A reverse telephone directory (also known as a gray pages directory, criss-cross directory or reverse phone lookup) is a collection of telephone numbers and associated customer details. However, unlike a standard telephone directory, where the user uses customer's details (such as name and address) in order to retrieve the telephone number of ...