"constantly supervised" is a correct and usable phrase in written English.
It refers to being under constant watch or control by someone. Example: "The child was constantly supervised by her parents while playing in the park."
We were constantly supervised.
Vulnerable and infected birds are quarantined in a highly monitored sanctuary that is constantly supervised and regulated.
Ms. Kleinman, who has kept her name, was constantly supervised by Mr. Palombo's mother, Ann Palombo, who lived in the neighborhood and was wary of both her career and her cooking.
The BBC's Stephen Evans, who is still in Pyongyang, said the North Korean leadership was displeased with the broadcaster's depictions of life in the country's capital, during which foreign reporters are constantly supervised by government-appointed interpreters.
When inhabitants meet with their families they are constantly supervised, and if they say anything about the abuses they face or the squalor of their conditions, they say they know they will be beaten and drugged with downers later.
The exact robot operation is constantly supervised by Kawasaki service team.
We can't constantly supervise everyone in football," insisted Blatter.
We somehow think that if we don't constantly supervise dad with our kids, he will get it wrong — but wrong means not the way we do things.
The governing idea of Hutto was that detainees would constantly supervise their children — as a result, it wasn't deemed a child-care facility, and required no relevant licensing.
Most of the current video surveillance systems require human operators to constantly supervise the cameras.
There is a need to hire someone to constantly supervise the testing station, however.
