Aviation Maintenance Terms beginning with C

Caution

The level or category of alert for conditions that require immediate flight crew awareness and subsequent flight crew response.

CDTI Assisted Visual Separation (CAVS)

The CDTI is used to assist the flight crew in acquiring and maintaining visual contact during visual separation on approach. The CDTI is also used in conjunction with visual, out-the-window contact to follow the preceding aircraft during the approach. The application is expected to improve both the safety and the performance of visual separation on approach. It may allow for the continuation of visual separation on approach even if visual contact out-the-window is momentarily lost.

Coast Interval

The elapsed time since a report from any source has been correlated with the track.

Cockpit Display of Traffic Information (CDTI)

The pilot interface portion of the Aircraft Surveillance Applications System. This interface includes traffic display(s) and all the controls that interact with such a display. At a minimum, CDTI includes a graphical plan-view (top down) traffic display. Additional graphical and non-graphical display surfaces may also be included. The CDTI receives position information of traffic and Ownship from the airborne surveillance and separation assurance processing (ASSAP) function. The ASSAP receives such information from the surveillance sensors and Ownship position sensors.

Conformal

A desirable property of map projections. A map projection (a function that associate points on the surface of an ellipsoid or sphere representing the earth to points on a flat surface such as the CDTI display) is said to be conformal if the angle between any two curves on the first surface is preserved in magnitude and sensed by the angle between the corresponding curves on the other surface.

Controller Pilot Data Link Communication (CPDLC)

Provides direct data communication between the pilot and the air traffic controller through a data link.

Correlation

The process of determining that a new measurement belongs to an existing track.