Quantum sensing devices that can gather ultra-precise data are being readied to test in the sky — and could define warfare and intelligence gathering in the 21st century.

Why it matters: Quantum computing usually gets the attention — and most of the funding — but quantum sensors are advancing quickly and are expected to be deployed sooner.

• Quantum sensors can measure minute changes in the environment and could one day be used to detect objects underwater or underground, or to provide navigational information if GPS is knocked out or not available.

• They could also play a key role in creating practical quantum computing.