| Answer | Crossword Clue |
|---|---|
| ASTROLABE | Old navigational instrument |
| SEXTANT | Navigational instrument |
| OCTANT | Navigational instrument |
| pelorus | a navigational instrument |
| peloruses | PELORUS, a navigational instrument |
| astrocompass | a navigational instrument for giving directional bearings from the centre of the earth to a particular star |
| astrocompasses | ASTROCOMPASS, a navigational instrument for giving directional bearings from the centre of the earth to a particular star |
