radar beacon
C1/C2Technical
Definition
Meaning
A ground-based or airborne device that emits a radar signal, used for identification, navigation, or marking a specific location.
Also known as a racon, it's a transponder that, when interrogated by a radar signal, transmits back a coded signal to identify itself and its precise location on the radar display.
Linguistics
Semantic Notes
The term is primarily used in aviation, maritime navigation, and military contexts. It's a compound noun where 'radar' functions as an attributive noun modifying 'beacon'.
Dialectal Variation
British vs American Usage
Differences
No major lexical differences. The acronym 'RACON' (RAdar beaCON) is used internationally in both technical manuals. Spelling and terminology are identical.
Connotations
Identical technical connotations in both varieties.
Frequency
Equally low-frequency, highly specialised term in both UK and US English, used almost exclusively by pilots, air traffic controllers, mariners, and military personnel.
Vocabulary
Collocations
Grammar
Valency Patterns
The radar beacon [verb: transmitted, responded, malfunctioned]The [noun: pilot, ship, station] [verb: activated, relied on, identified] the radar beacon.The radar beacon [prep: on, at, near] [location: the headland, the airstrip, buoy 14]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms for this highly technical term]”
Usage
Context Usage
Business
Rarely used outside of companies manufacturing or servicing aviation/maritime navigation equipment.
Academic
Used in technical papers and textbooks on aviation, navigation systems, and remote sensing.
Everyday
Extremely rare. Most general speakers would not know the term.
Technical
Standard term in aviation, maritime, search and rescue, and military operations. Essential for precise navigation and identification.
Examples
By Part of Speech
verb
British English
- The device will radar-beacon its position every five seconds.
- The downed aircraft failed to radar-beacon its location.
American English
- The system is designed to radar-beacon under duress.
- They had to radar-beacon the landing zone for the helicopters.
adverb
British English
- [Usage as an adverb is highly non-standard and virtually unattested for this term.]
American English
- [Usage as an adverb is highly non-standard and virtually unattested for this term.]
adjective
British English
- The radar-beacon signal was faint but identifiable.
- They conducted a radar-beacon test procedure.
American English
- We need a radar-beacon transponder for this mission.
- The radar-beacon identification code is classified.
Examples
By CEFR Level
- [Too specialised for A2 level; no typical examples.]
- The rescue team located the shipwreck using its emergency radar beacon.
- Air traffic control identified the aircraft by its unique radar beacon squawk code.
- Mariners rely on strategically placed radar beacons, or racons, to confirm their position when visual navigation is impossible, especially in poor weather near hazardous coastlines.
Learning
Memory Aids
Mnemonic
Think: RADAR BEACON = A BEACON that talks to RADAR. It shouts back a coded message when a radar 'shines' on it.
Conceptual Metaphor
A LIGHTHOUSE FOR RADAR: Just as a lighthouse emits light for ships to see, a radar beacon emits a radio signal for radar systems to detect and identify.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation like 'радарный маяк' as it's ambiguous; the standard technical term is 'радиолокационный маяк-ответчик' or 'ракон' (racon).
- Don't confuse with 'радиомаяк' (radio beacon), which is a different type of navigational aid.
Common Mistakes
- Confusing 'radar beacon' with a simple 'radio beacon' (the latter does not respond to radar interrogation).
- Using 'radar beacon' to refer to any object that simply shows up on radar (e.g., 'a mountain is a natural radar beacon').
Practice
Quiz
What is the primary function of a radar beacon (racon)?
FAQ
Frequently Asked Questions
In aviation/maritime contexts, yes, a radar beacon is a specific type of transponder designed to respond to radar interrogations. The term 'transponder' is more general.
No. Radar beacons are specialised devices for aviation, maritime, and military use. Cars and phones use different technologies like GPS and cellular signals.
'Squawk' is aviation slang for the four-digit transponder code assigned by air traffic control. Setting this code on the aircraft's radar beacon allows controllers to identify it uniquely on their radar screens.
You can see the physical device, often housed in a cylinder on a buoy or tower, but you cannot see the radio signal it emits. That signal is detected and displayed on a radar screen.