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Directive/informative call that indicates aircraft will continue straight ahead at the merge and not turn with target/targets. Blue on blue Friendly fire, inadvertent hostile engagement between allies. Bogey A radar or visual air contact whose identity is unknown. Bogey dope Request for target information as briefed/available. Box
The civilian aircraft frequency for voice distress alerting is 121.5 MHz. Military aircraft use 243 MHz (which is a harmonic of 121.5 MHz, and therefore civilian beacons transmit on this frequency as well). Aircraft can also signal an emergency by setting one of several special transponder codes, such as 7700.
The most basic radio-navigational aid used in aviation is the non-directional beacon or NDB. It is a simple low- and medium-frequency transmitter used to locate airway intersections and airports and to conduct instrument approaches, with the use of a radio direction finder located on the aircraft.
An aerodrome beacon, airport beacon, rotating beacon or aeronautical beacon is a beacon installed at an airport or aerodrome to indicate its location to aircraft pilots at night. An aerodrome beacon is mounted on top of a towering structure, often a control tower , above other buildings of the airport.
An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue. Various types of emergency locator beacons are carried by aircraft, ships, vehicles, hikers and cross-country skiers.
Also has Cospas-Sarsat beacon. The latest model AN/PRC-112G, built by General Dynamics can communicate with satellites as well. [12] Over 31,000 radios in the PRC-112 family have been produced. [13] AN/PRC-125 (Navy) Rescue Swimmer Radio. [8] [10] AN/PRC-149 Rescue Radio, replaced the PRC-90, PRC-112 and PRC-125 for non-combat use. [14]
The last visual airway beacon was supposedly shut down in 1973, [12] but a few airway beacons are still operating in Portland, Oregon and Western Montana. [16] Those in Montana are charted on the Great Falls sectional chart. [17] Montana was the last state to officially maintain airway beacons, through the state's Aviation Division.
Radio transmitters for air and sea navigation are known as beacons and are the radio equivalent to a lighthouse. The transmitter sends a Morse Code transmission on a Long wave (150 – 400 kHz) or Medium wave (520 – 1720 kHz) frequency incorporating the station's identifier that is used to confirm the station and its operational status.