| Answer | Crossword Clue |
|---|---|
| crewed | (esp. of an aircraft, ship, or spacecraft) operated by a crew on board |
| engineer | The operator or supervisor of an engine, esp. a railroad locomotive or the engine on an aircraft or ship |
| engineers | The operator or supervisor of an engine, esp. a railroad locomotive or the engine on an aircraft or ship |
| blackboard | A large board with a smooth, typically dark, surface attached to a wall or supported on an easel and used for writing on with chalk, esp. by teachers in schools |
| blackboards | A large board with a smooth, typically dark, surface attached to a wall or supported on an easel and used for writing on with chalk, esp. by teachers in schools |
