In the Navy, you would describe this as dead stop, dead in the water means propulsion is down. Anchored is dead stop.
I am not sure what civilians would describe this as, but I took your meaning that propulsion was down.
This is Dead in the Water, which can be caused by loss of propulsion or order from a legitimate maritime authority.
Regardless of the reason, because of her inability to quickly respond to maneuver, she is being given the wide berth required of all ships other than rescue vessels. The lack of nearby rescue vessels likely means she has minor damage, few or no minor injuries, and is seaworthy. Therefore, her state is probably due to compliance with the local Maritime authority.