| Answer | Crossword Clue |
|---|---|
| ERROR | It's marked with an X |
| SPOT | It's marked by an X |
| SPOT | It's marked by an "X" |
| RATED | Marked with an X, maybe |
| BALLOT | It may be marked with an X |
| ONEWAYSTREET | It's marked with an arrow |
| astrolabes | An instrument formerly used to make astronomical measurements, typically of the altitudes of celestial bodies, and in navigation for calculating latitude, before the development of the sextant. In its basic form (known from classical times), it consists of a disk with the edge marked in degrees and a pivoted pointer |
