Definition
A radar display located in an air traffic control tower that has been formally certified for use in providing radar services to aircraft. Certification means the display meets the FAA's technical and operational standards for accuracy, reliability, and presentation, allowing tower controllers to use it for separating, sequencing, and identifying aircraft rather than only for situational awareness.
Plain English
A radar screen in the control tower that has been officially approved for the controller to use when actively directing aircraft, not just for general awareness of where traffic is.
Context Anchor
You may see CTRD in FAA glossary material or in discussions of what radar information a tower controller is authorized to use.
Derivation
The name describes itself, but the key word is 'Certified.' Certification here means the equipment has passed a formal FAA approval process — so the controller can rely on it for active control duties, not just glance at it for reference.
Why Pilots Care
Controllers rely on it to issue accurate instructions that keep aircraft safely separated during takeoff, landing, and ground operations.
Intuition Check
Do not read CTRD as a separate radar system. It is the approved display in the tower that shows radar information to controllers.
Example Sentence 1
The tower controller used the CTRD to identify the inbound traffic and pass an accurate position report to the arriving aircraft.
Example Sentence 2
During busy periods the tower team uses the CTRD to maintain spacing on final approach.