AbbreviationsWhat does the abbreviation OIS mean? (Doc 8168)
Domanda 232, Air Law - ATPL - Airline Transport Pilot license
| Obstacle in surface. |
| Obstacle identification surface. |
| Obstruction in surface. |
| Obstacle identification slope. |
| Obstacle in surface. |
| Obstacle identification surface. |
| Obstruction in surface. |
| Obstacle identification slope. |
