NDB navaids
Non-Directional Beacons — low/medium-frequency beacons flown with an ADF. 6,610 on record.
| Ident | Name | Country |
|---|---|---|
| SIK | Sikeston | 🇺🇸 US |
| KU | Silchar | 🇮🇳 IN |
| TOX | Siler City | 🇺🇸 US |
| BFW | Silver Bay | 🇺🇸 US |
| SIM | Simara | 🇳🇵 NP |
| SMI | Simenti | 🇸🇳 SN |
| SF | Simferopol | 🇺🇦 UA |
| F | Simferopol | 🇺🇦 UA |
| N | Simferopol | 🇺🇦 UA |
| SN | Simferopol | 🇺🇦 UA |
| SI | Simiutaq | 🇬🇱 GL |
| SH | Simla | 🇮🇳 IN |
| SPG | Simpsons Gap | 🇦🇺 AU |
| SG | Sinabang | 🇮🇩 ID |
| SIR | Sinclair | 🇺🇸 US |
| NF | Singkawang | 🇮🇩 ID |
| NE | Singkep | 🇮🇩 ID |
| SGT | Singleton | 🇦🇺 AU |
| SIN | Sinop | 🇹🇷 TR |
| SOY | Sioux Center | 🇺🇸 US |
| GAK | Sioux Gateway | 🇺🇸 US |
| YXL | Sioux Lookout | 🇨🇦 CA |
| ST | Sirotinskaya | 🇷🇺 RU |
| SIR | Sirri Island | 🇮🇷 IR |
| SRT | Sirte | 🇱🇾 LY |
| SS | Sishen | 🇿🇦 ZA |
| SM | Sisimiut | 🇬🇱 GL |
| SIT | Sitka | 🇺🇸 US |
| SW | Sittwe | 🇲🇲 MM |
| SIV | Sivas | 🇹🇷 TR |
| SK | Sk | 🇹🇼 TW |
| SA | Skagi | 🇮🇸 IS |
| BVS | Skagit/Bay View | 🇺🇸 US |
| OZ | Skallen | 🇸🇪 SE |
| SD | Skardu | 🇵🇰 PK |
| SKD | Skaudvile | 🇱🇹 LT |
| TB | Skeena | 🇨🇦 CA |
| SKX | Ski | 🇺🇸 US |
| SKC | Skiathos | 🇬🇷 GR |
| FT | Skipi | 🇺🇸 US |
| SX | Skookum | 🇨🇦 CA |
| BU | Skopje | 🇲🇰 MK |
| PT | Skopje | 🇲🇰 MK |
| KN | Skrova | 🇳🇴 NO |
| SZ | Skukuza | 🇿🇦 ZA |
| DR | Skurygino | 🇷🇺 RU |
| SIF | Slammer | 🇺🇸 US |
| SLP | Sleap | 🇬🇧 GB |
| DEF | Slidell | 🇺🇸 US |
| JES | Slover | 🇺🇸 US |