| SEXTANTS | Navigational tools that measure the positions of celestial bodies |
| SCHEME | A diagram of the positions of celestial objects; a chart, outline or table; a systematic plan of action; or, a secret or underhand plot (6) |
| LENGTHS | Units that measure the distance between two horses in a race |
| ASTROLABES | Instruments once used to calculate the position of celestial bodies |
| ASTROLABE | What instrument with a disc and pointer was formerly used for observing the position of celestial bodies? (9) |
| ASTROLOGY | Study of the movements and relative positions of celestial bodies in order to divine information about human affairs (9) |
| SONARS | Navigational tools |
| MAPS | Tourists' navigational tools |
| CREASE | In cricket, any of the three whitewash lines (bowling, return and popping) that regulate the positions of the batsman and bowler (6) |
| TRACTION | Sustained pulling of a part of the body to maintain the positions of fractured bones, correct deformity etc. (8) |
| LALANDE | Surname of the French astronomer who, in his Histoire Celeste, catalogued the positions of about 50,000 stars (7) |
| ANTLIA | Symbolising an air pump, one of the constellations named after scientific instruments by astronomer Lacaille who also determined the positions of some 10,000 stars (6) |
| RESHUFFLE | Interchange the positions of (members of a team) |
| ASTROLOGERS | Those who study the positions of the planets |
| CASTLES | Interchanges the positions of the king and a rook in chess. (7) |
| STARMAP | Chart showing the positions of heavenly bodies (4,3) |
| BRAHE | Tycho ---, Danish astronomer who designed and constructed instruments to plot the positions of the stars (5) |
| EVENS | Odds -- or the positions of 11 among soldiers? (5) |
| OVER | The positions of bishops abroad, we hear! (8) |
| SEES | The positions of bishops abroad, we hear! (8) |
