Fr: point d’atterrissage
touchdown RVR
The RVR readout values obtained from RVR equipment serving the touchdown zone.
Fr: RVR au point de poser
touchdown zone The first 3000 ft of the runway or the first third of the runway, whichever is less, measured from the threshold in the direction of landing.
. abbreviation: TDZ
Fr: zone de poser
touchdown zone elevation
The highest centreline elevation in the touchdown zone.
. abbreviation: TDZE
Fr: altitude de zone de poser
touchdown zone lighting Variable-intensity white lighting in the touchdown zone consisting of bars of three inset lights per bar situated on either side of the runway centreline at 100-ft intervals, commencing 100 ft from the threshold and extending 3000 ft down the runway. The lights are unidirectional, showing in the direction of approach to landing.
. abbreviation: TDZL
Fr: balisage lumineux de zone de poser
touchdown zone marking A marking provided in the touchdown zone of a precision approach runway consisting of pairs of rectangular markings symmetrically disposed about the runway centreline. Fr: marque de zone de poser
TOV Abbreviation for: terminal occupancy value Fr: TOV
tower Other expression for: control tower (TWR)
tower control A control service provided by an airport controller to aircraft and vehicles on active runways and to aircraft in the vicinity of a controlled airport. . other expression: airport control
. see also: airport control service
Fr: contr.le tour
tower radar area 
An area of defined dimensions surrounding a controlled aerodrome within which radar service is provided.