Mast for measuring or illumination purposes, especially for flight navigation lights

A mast for illuminating or measuring purposes such as for supporting flight navigation lights or wind measuring devices, comprising a mast made of glass-fiber or carbon-fiber reinforced plastic material, said mast being disposed on a mast-support foundation, said mast further comprising tilt means operable to tilt said mast relative to said foundation, said mast further comprising an elongated upright section having a longitudinal end, said tilt means comprising a base plate secured to said longitudinal end, a foundation plate secured to said mast-support foundation, hinge means pivotably mounting said base plate on said foundation plate, operable means operably disposed between said base plate and said foundation plate for effecting pivotable movement of said base plate on said foundation plate, said operable means comprising a threaded adjusting spindle means pivotably mounted on said foundation plate, an adjusting support means threadedly mounted on said spindle means, and connectable means connecting said adjusting support means to said base plate, said elongated upright section of said mast being made of a plastic material and said base plate being made of metal, a support pipe welded into said base plate, said plastic elongated upright section of said pipe being mounted on said support pipe, and threaded means for threadedly securing said base plate to said foundation plate when said mast is in an upright position with its longitudinal axis generally perpendicular to said foundation plate.