Air carrier captain reported tower was giving taxi instructions on the prm monitor frequency.

Attributes
ACN	1667304
Time
Date	201907
Local Time Of Day	1801-2400
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 226 Flight Crew Total 7689 Flight Crew Type 4800
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Narrative:

During final approach to ILS prm 10C in ord; constant taxi instructions were being given to preceding aircraft upon landing. The monitor frequency is supposed to be a safety frequency for transgressions or proximity of aircraft; not a supplementary taxi frequency because the south tower is short staffed and the monitor is the ad hoc taxi controller.

Original NASA ASRS Text

Title: Air Carrier Captain reported Tower was giving taxi instructions on the PRM Monitor frequency.

Narrative: During final approach to ILS PRM 10C in ORD; constant taxi instructions were being given to preceding aircraft upon landing. The monitor frequency is supposed to be a SAFETY FREQUENCY for transgressions or proximity of aircraft; not a supplementary taxi frequency because the south tower is short staffed and the Monitor is the ad hoc taxi controller.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.