The phrase "without surveillance" is grammatically correct and can be used in written English.
It means not being watched or monitored by someone or something. Example: The suspect was able to enter the building without surveillance, making it easy for them to commit the crime unnoticed.
They say that keeping communications secret helps terrorists, since they can use networks to communicate without surveillance from the authorities.
Information from all points of view, including those that are unpopular with the mainstream of society, must be available to all, without surveillance or exposure.
Autonomous drones can be programmed to search for particular characteristics in those they hunt, and be controlled from afar without surveillance – all through data-driven algorithms.
They have a simple and common goal: to create ways for people to use the Internet and to communicate online without surveillance.
The right to trial by jury, the right to silence, the right not to be punished until a court has decided that the law has been broken, the right to demonstrate and protest, the presumption of innocence, the right to private communication, the right to travel without surveillance and the details of that journey being retained - all have been curtailed by your legislation.
The bad news is that without surveillance, all the peas end up under one cup.
Torture, arrest without trial and surveillance without cause are being justified because people are afraid and these practices are deemed to be keeping America safe from terrorism.
Like Stoppard, Havel asks only to be allowed to work freely, without political surveillance.
But without video surveillance, the police struggled for days to put together a reliable description of him from witness accounts.
It happens even more when low-dose antibiotics are deployed by the tonne in large-scale agriculture, without any surveillance to report back what bugs are emerging.
Once upon a time, before mobile phones, it was really hard, without direct surveillance, for anyone else to know where you were.
