| ECHOSOUNDER | A device to determine the seabed's depth or detect objects in water |
| RADAR | Something that can detect objects in extra darkness (5) |
| TINWARE | Metal objects in water tossed about |
| IVE | Suffix for direct or detect |
| SONAR | Measuring instrument that sends out an acoustic pulse, used to detect objects on or under the surface of the water (5) |
| SAPPER | What is a military engineer who lays or detects and disarms mines? (6) |
| NOSES | Examines or detects by smelling (5) |
| SHADING | Creation of the illusion of darkness, depth or tenebrosity in a colour, drawing or painting; or, obscurity in meaning (7) |
| PLUMB | Weight, typically of lead,suspended at the end of a line to determine water depth or |
| TRAWL | A dragnet; an act of fishing along the seabed with said bag- or sock-shaped seine; thus, a thorough comb, fish or search for information, whether on the Net or in the depths of one's brain (5) |
| ORTHOSIS | A device to support a part of the body or to assist movement (8) |
| BILGEPUMP | A device to remove water from the lowest internal part of the hull in boats and ships (5,4) |
| PARACHUTE | A device to retard the fall of a person or package from an aircraft (9) |
| ICEANCHOR | A device to attach a ship to a floe (3,6) |
| THIRDDIMENSION | The depth or thickness of a real object (5,9) |
| HAND | Measure of four inches used to determine the height of a horse, typically from the ground to the highest point of the withers (4) |
| SCARECROW | A device to frighten birds from crops, usually a figure of a man dressed in ragged clothes (9) |
| CUSHION | A device to dampen or reduce the shock of an impact |
| ANTENNA | A device to send or receive TV or radio signals (7) |
| RESOLVINGPOWER | The ability of a device to distinguish minute objects (9,5) |
