The diastolic blood pressure number or the bottom number indicates the pressure in the arteries when the heart rests between beats. A normal diastolic blood pressure number is 80 or less. A diastolic blood pressure between 80 and 89 is normal but higher than ideal. A diastolic blood pressure number of 90 or higher, on repeated measurements, is considered to be hypertension or high blood pressure.
(Learn how and when to remove this template message) Air traffic controllers are people trained to maintain the safe, orderly, and expeditious flow of air traffic in the global air traffic control system. The position of air traffic controller is one that requires highly specialized knowledge, skills, and abilities.
Some air traffic controllers work at the Air Traffic Control Systems Command Center. These controllers monitor traffic patterns within the entire national airspace that could create bottlenecks in the system. When they find a bottleneck, they provide instructions to other controllers that help to prevent traffic jams.ir traffic controllersâ primary concern is safety, but they also must direct aircraft efficiently to minimize delays. They manage the flow of aircraft into and out of the airport airspace, guide pilots during takeoff and landing, and monitor aircraft, as they travel through the skies.