NDB navaids
Non-Directional Beacons — low/medium-frequency beacons flown with an ADF. 6,610 on record.
| Ident | Name | Country |
|---|---|---|
| E | Odesa | 🇺🇦 UA |
| D | Odesa | 🇺🇦 UA |
| OD | Odesa | 🇺🇦 UA |
| OD | Odienne | 🇨🇮 CI |
| OLZ | Oelwein | 🇺🇸 US |
| GAZ | Oguzeli | 🇹🇷 TR |
| OH | Ohakea | 🇳🇿 NZ |
| IZD | Ohrid | 🇲🇰 MK |
| OIA | Oiapoque | 🇧🇷 BR |
| TU | Oillr | 🇺🇸 US |
| OK | Okinawa | 🇯🇵 JP |
| OK | Okitipupa | 🇳🇬 NG |
| OJ | Okondja | 🇬🇦 GA |
| ZX | Oksibil | 🇮🇩 ID |
| N | Oksywie | 🇵🇱 PL |
| K | Oksywie | 🇵🇱 PL |
| KN | Oksywie | 🇵🇱 PL |
| NK | Oksywie | 🇵🇱 PL |
| PR | Oktyabrsky | 🇹🇯 TJ |
| FE | Oktyabrsky | 🇷🇺 RU |
| SME | Olbia Costa Smeralda | 🇮🇹 IT |
| YOC | Old Crow | 🇨🇦 CA |
| OIP | Old Rip | 🇺🇸 US |
| OLD | Old Town | 🇺🇸 US |
| K2 | Olds-Didsbury | 🇨🇦 CA |
| LYS | Olean | 🇺🇸 US |
| ON | Olekminsk | 🇷🇺 RU |
| NL | Olenek | 🇷🇺 RU |
| OLD | Olinda | 🇧🇷 BR |
| OLV | Olive Branch | 🇺🇸 US |
| OLM | Olmedo | 🇪🇨 EC |
| OLY | Olney | 🇺🇸 US |
| ONY | Olney | 🇺🇸 US |
| MB | Olste | 🇺🇸 US |
| KA | Olzony | 🇷🇺 RU |
| OMK | Omak | 🇺🇸 US |
| OMD | Omidiyeh | 🇮🇷 IR |
| OM | Ominato | 🇯🇵 JP |
| MI | Omiya | 🇯🇵 JP |
| TK | Omsk | 🇷🇺 RU |
| RM | Omsk | 🇷🇺 RU |
| JB | Omura | 🇯🇵 JP |
| OA | Ondangwa | 🇳🇦 NA |
| OG | Onega | 🇷🇺 RU |
| MW | Onida | 🇺🇸 US |
| OI | Ono-I-Lau | 🇫🇯 FJ |
| ONO | Ontario | 🇺🇸 US |
| OGM | Ontonagon | 🇺🇸 US |
| UQN | Onyun | 🇺🇸 US |
| OOD | Oodnadatta | 🇦🇺 AU |