NDB navaids
Non-Directional Beacons — low/medium-frequency beacons flown with an ADF. 6,610 on record.
| Ident | Name | Country |
|---|---|---|
| SC | South Caicos | 🇹🇨 TC |
| 2A | South Indian Lake | 🇨🇦 CA |
| EAS | Southampton | 🇬🇧 GB |
| KT | Southdowns | 🇿🇲 ZM |
| SCR | Southern Cross | 🇦🇺 AU |
| UY | Sovetskiy | 🇷🇺 RU |
| SO | Soyo | 🇦🇴 AO |
| SMY | Soyya | 🇺🇸 US |
| SLV | Spa | 🇧🇪 BE |
| SPQ | Spain | 🇺🇸 US |
| SAR | Sparta | 🇺🇸 US |
| 5M | Sparwood | 🇨🇦 CA |
| PD | Speez | 🇺🇸 US |
| DM | Spenc | 🇺🇸 US |
| PSA | Spessart | 🇩🇪 DE |
| PK | Spida | 🇺🇸 US |
| PWF | Sportys | 🇺🇸 US |
| XNE | Spring Hill | 🇺🇸 US |
| LLU | Spring River | 🇺🇸 US |
| 2B | Springdale | 🇨🇦 CA |
| SF | Springfield | 🇳🇿 NZ |
| SXD | Springfield | 🇺🇸 US |
| IKY | Springfield | 🇺🇸 US |
| SPH | Springhill | 🇺🇸 US |
| SUH | Sprucehead | 🇺🇸 US |
| KR | Squaw | 🇨🇦 CA |
| XQA | Squaw | 🇺🇸 US |
| FO | Squir | 🇺🇸 US |
| WZ | Srednebeloye | 🇷🇺 RU |
| SAI | Sri Sathya Sai | 🇮🇳 IN |
| SNG | Srinagar | 🇮🇳 IN |
| AY | St Anthony | 🇨🇦 CA |
| YIF | St Augustin | 🇨🇦 CA |
| CAT | St Catherine | 🇪🇬 EG |
| FXR | St Denis Gillot | 🇷🇪 RE |
| ELI | St Elie | 🇬🇫 GF |
| SGE | St George | 🇦🇺 AU |
| JYG | St James | 🇺🇸 US |
| SJX | St James | 🇺🇸 US |
| OPL | St Landry | 🇺🇸 US |
| CW | St Laurent Du Maroni | 🇬🇫 GF |
| STM | St Marys | 🇬🇧 GB |
| SM | St Mawgan | 🇬🇧 GB |
| 8H | St Paul | 🇨🇦 CA |
| 4K | St Theresa Point | 🇨🇦 CA |
| 7B | St Thomas | 🇨🇦 CA |
| UFX | St-Felix-de-Valois | 🇨🇦 CA |
| T8 | St-Frédéric | 🇨🇦 CA |
| SP | St-Pierre | 🇵🇲 PM |
| SN | St. Catharines | 🇨🇦 CA |