In United States aviation, a terminal radar service area (TRSA) is a delimited airspace where radar and air traffic control services are made available to pilots flying under instrument flight rules or (optionally) visual flight rules, to maintain aircraft separation.
TRSAs most often surround busy U.S. airports. In recent years, many of them have been replaced by Class C or Class B airspace.
Terminal Radar Service Area was established as part of a program to create terminal radar stations at selected airports. Because they were not subject to the rulemaking process of 14 CFR Part 91, they do not fit into any existing U.S. classifications of airspace, and have been classified as non-part 71 airspaces. While operating in these airspaces, pilots who choose to participate receive radar services, but participation is not required for VFR operations.
TRSAs encompass a primary airport with a class "D" designation, with the TRSA above other controlled airspace (Typically Class E Airspace) with a typical floor of 700 feet or 1,200 feet AGL (Above Ground Level).
TRSAs are shown on most VFR (Visual Flight Rules) sectional charts as solid grey with black text.
| Airport | Approach Control | City | State | |
|---|---|---|---|---|
| Maxwell Air Force Base | Montgomery Approach | Montgomery | Alabama | |
| Fort Smith Regional Airport | Razorback Approach | Fort Smith | Arkansas | |
| Fairbanks International Airport | Fairbanks Approach | Fairbanks | Alaska | |
| Palm Springs International Airport | SoCal Approach | Palm Springs | California | |
| Augusta Regional Airport | Augusta Approach | Augusta | Georgia | |
| Middle Georgia Regional Airport | Atlanta Approach | Macon | Georgia | |
| Robins Air Force Base | Atlanta Approach | Warner Robins | Georgia | |
| Chicago Rockford International Airport | Rockford Approach | Rockford | Illinois | |
| Lake Charles Regional Airport | Lake Charles Approach | Lake Charles | Louisiana | |
| Monroe Regional Airport | Monroe Approach | Monroe | Louisiana | |
| Kalamazoo/Battle Creek International Airport | Great Lakes Approach | Kalamazoo | Michigan | |
| Muskegon County Airport | Great Lakes Approach | Muskegon | Michigan | |
| MBS International Airport | Great Lakes Approach | Saginaw | Michigan | |
| Gulfport–Biloxi International Airport | Gulfport Approach | Gulfport | Mississippi | |
| Great Falls International Airport | Great Falls Approach | Great Falls | Montana | |
| Greater Binghamton Airport | Binghamton Approach | Binghamton | New York | |
| Elmira/Corning Regional Airport | Elmira Approach | Elmira | New York | |
| Wilmington International Airport | Wilmington Approach | Wilmington | North Carolina | |
| Hector International Airport | Fargo Approach | Fargo | North Dakota | |
| Youngstown–Warren Regional Airport | Youngstown Approach | Youngstown | Ohio | |
| Altus Air Force Base | Altus Approach | Altus | Oklahoma | |
| Erie International Airport | Erie Approach | Erie | Pennsylvania | |
| Capital City Airport (same TRSA as Harrisburg Int'l) | Harrisburg Approach | Harrisburg | Pennsylvania | |
| Harrisburg International Airport | Harrisburg Approach | Harrisburg | Pennsylvania | |
| Wilkes-Barre/Scranton International Airport | Wilkes-Barre Approach | Wilkes-Barre/Scranton | Pennsylvania | |
| Tri-Cities Regional Airport | Tri-City Approach | Bristol | Tennessee | |
| Jack Brooks Regional Airport | Houston Approach | Beaumont | Texas | |
| East Texas Regional Airport | Longview Approach | Longview | Texas | |
| Tri-State Airport | Huntington Approach | Huntington | West Virginia | |
| Andersen Air Force Base | Guam Approach | Tamuning | Guam |