| Answer | Crossword Clue |
|---|---|
| TRIB | River arm: Abbr. |
| REE | Arm of Ireland's Shannon river. |
| ESTUARY | Sea arm at lower end of a river. |
| AAF | Air arm: Abbr. |
| HND | Arm part: Abbr. |
| SAC | Defense arm: Abbr. |
| SAC | Flight arm: Abbr. |
| NAV | Defense arm: Abbr. |
| SAF | Defense arm: Abbr. |
| USN | Service arm: Abbr. |
| USN | Sea arm: abbr. |
| USN | Arm of defense: Abbr. |
| RCAF | Canadian air arm: Abbr. |
| NORAD | Air Force arm: Abbr. |
| RMS | U. S. postal arm: Abbr. |
| INF | Arm of the Army: Abbr. |
| USA | Important arm of our service: Abbr. |
