ATC advises

“ATC (air traffic control) advises”

The term is used to prefix a message of noncontrol information when it is relayed to an aircraft by other than an air traffic controller.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Per Handbook 4-1-5, waypoints filed in random RNAV routes automatically become compulsory reporting points for the flight unless ATC advises you otherwise.
When ATC advises you to expect a hold or clears you to someplace that's not an airport, start thinking about your options.
Once ATC advises "radar contact," you are still responsible for your obstacle separation on the departure procedure.
* Radar service is automatically terminated when ATC advises pilots to change to the tower or an advisory frequency.