Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:navigation
|
| gptkbp:alsoKnownAs |
A-N radio range
|
| gptkbp:category |
aviation navigation
radio navigation |
| gptkbp:courseIndication |
audio signals (A and N Morse code)
|
| https://www.w3.org/2000/01/rdf-schema#label |
Four Course Radio Range
|
| gptkbp:introducedIn |
1920s
|
| gptkbp:inventedBy |
United States Bureau of Standards
|
| gptkbp:operatesIn |
low frequency band
|
| gptkbp:operationalUntil |
1970s
|
| gptkbp:provides |
four course guidance
|
| gptkbp:replacedBy |
gptkb:NDB
gptkb:VOR modern navigation systems |
| gptkbp:type |
continuous wave
modulated tone |
| gptkbp:usedBy |
gptkb:Canada
gptkb:United_States other countries |
| gptkbp:usedFor |
aircraft navigation
|
| gptkbp:usedIn |
instrument flying
|
| gptkbp:bfsParent |
gptkb:Radio_Range
|
| gptkbp:bfsLayer |
7
|