You must subject yourself to a certain amount of surveillance.

"What kind of surveillance do you have on her now?"

It was to be, in other words, a system of total surveillance.

Now the division itself is under a kind of surveillance.

Many systems are involved in the technical process of surveillance.

We weren't in a good position to conduct any kind of surveillance.

He had to assume she was under some kind of surveillance.

The mean age at the start of surveillance was 35 (range 6-63 years).

He also allowed to carry out a very difficult piece of surveillance.

Up to now the police and other parties have had legal access only to what was said or written at the time of surveillance.