CL Aviation Abbreviation

Clearance

 Authorization given by ATC to proceed as requested or instructed (for example “Cleared for take-off”, “Cleared for visual approach”, “Cleared to land”) or Minimum distance from the extremity of a crane to the nearest obstruction.  Or The gap between two mating parts or the space provided between the relief of a cutting tool and the surface being cut. or The control and positioning of plant equipment for providing protection for personnel and equipment during work on plant devices.

Cabin Lighting

Halogen lamps and/or light-emitting diodes (LEDs) located in a vehicles headliner that illuminate a vehicles interior space in its entirety.

Clmud