The phrase "when on duty" is correct and commonly used in written English.
It is typically used to refer to a time when someone is working or responsible for specific tasks. Example: "Police officers must always be alert when on duty to ensure the safety of the community." Another example: "Nurses are expected to be available for patient care at all times when on duty."
These changes had a significant impact on the working patterns of the medical and nursing staffs as staffing rotas were changed to allow 40 hour consultant cover in emergency gynaecology, with consultants on duty and physically present in the hospital when on duty in one week blocks from Monday to Friday from 9-5 pm.
When on duty, I would be paged to the trauma ward when one of the residents of West Philadelphia was being rushed to the hospital by ambulence or helicoptor.
Most GPs expressed that they had a high workload when on duty, and they described a practical and emotional need of completing one consultation before moving on to the next patient.
Charitable to widows of firemen killed when on duty.
When on duty, men can be away for two-and-a-half months at a time.
When on duty, "I," as he's sometimes called by his family, works in "mortuary affairs": "I pick up guts.
This obsession also usefully explains much that was mysterious about the DG's behaviour when on-duty, such as his peculiar dance moves for photographers on his first day, and the speed off the mark after public appearances that prevents journalists asking questions – both now clearly the product of a horror of standing still and so failing to score "paces".
Who's their master, the police department or the party host?" And when on-duty officers respond to a disturbance, as they did at the riotous July 4th extravaganza thrown in Bridgehampton by the hip-hop entrepreneur Sean Combs, what happens when they face a fellow officer, possibly one with higher seniority, working security?
The differences couldn't be explained by a cushy palace existence, the researchers wrote, because most eunuchs only went to the palace when on-duty and lived outside it.
Although I have been known to participate in marches when I'm not "on duty".
In particular, Löw has already shown he is not too proud to take advantage of Lahm's increased exposure to midfield roles and has assigned him similar duties when on international duty.
