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DECCA and DECTRA Radionavigation Systems
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DECCA was a hyperbolic positioning system used by ships and small aircraft. The system was in operation from 1946 until 2001. It was originally developed in the UK, but spread across the world by about 1980. The usable range for DECCA navigation was about 400 nm during the day, down to about 200-250 nm at night.
DECTRA was a longer-range version of DECCA that operated from 1957 until about 1967.
Additional information on DECCA and DECTRA is available in the excellent Appendix by Dr. Paul D. Groves (see link below).
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Frequency Bands |
| Band | Use | Service11 | Table |
| 70.087 - 70.583 kHz | DECCA and DECTRA Radionavigation Systems | Radionavigation | - |
| 84.105 - 85.9 kHz | DECCA and DECTRA Radionavigation Systems | Radionavigation | - |
| 112.14 - 114.533 kHz | DECCA and DECTRA Radionavigation Systems | Radionavigation | - |
| 114.943 - 117.397 kHz | DECCA and DECTRA Radionavigation Systems | Radionavigation | - |
| 126.157 - 128.85 kHz | DECCA and DECTRA Radionavigation Systems | Radionavigation | - |
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