| Answer | Crossword Clue |
|---|---|
| RDF | Direction finder: Abbr. |
| MAP | Direction finder? |
| VANE | Wind direction finder. |
| goniometer | an instrument for measuring angles; direction finder |
| goniometers | GONIOMETER, an instrument for measuring angles; direction finder |
| rawin | method of observation of upper-air winds conducted by means of a weather balloon tracked by radar or a radio direction finder |
| rawins | method of observation of upper-air winds conducted by means of a weather balloon tracked by radar or a radio direction finder |
