| Type | Number | Title | Status | Office | Date |
|---|---|---|---|---|---|
| Order | 6740.6 | U.S. National Aviation Standard for the Nondirectional Beacon (NDB) Automatic Direction Finder (ADF) System | Active | ADS-110 |
| Type | Number | Title | Status | Office | Date |
|---|---|---|---|---|---|
| Order | 6740.6 | U.S. National Aviation Standard for the Nondirectional Beacon (NDB) Automatic Direction Finder (ADF) System | Active | ADS-110 |