Definition
Airport control towers that provide air traffic control services to aircraft operating under instrument flight rules in addition to handling visual flight rule traffic. IFR towers have the equipment, procedures, and authority to issue IFR clearances, separate IFR traffic in the immediate airport area, and coordinate with the associated TRACON or center for arrivals and departures.
Plain English
A tower at an airport that handles both visual-flight traffic and aircraft flying on instrument flight plans, including issuing instrument clearances and coordinating with radar controllers.
Context Anchor
Seen in terminal air traffic control discussions, especially when an airport tower is part of the pilot’s contact path during an instrument departure or arrival.
Why Pilots Care
Knowing whether your departure or destination has an IFR tower tells you where to expect to receive your clearance, who you'll talk to first, and how handoffs to TRACON or center will be handled. At a non-IFR (VFR) tower, you typically pick up your clearance from a different facility before takeoff.
Intuition Check
Do not read “towers” here as only the physical tower building. In this context, it means the air traffic control function at an airport that is authorized to handle instrument-flight operations.
Example Sentence 1
Because the field had an IFR tower, the pilot received the departure clearance directly from ground control instead of calling a remote facility.
Example Sentence 2
TRACON handed the arriving flight off to the IFR tower for final sequencing to the runway.