§ 25.1397 - Color specifications.  


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  • § 25.1397 Color specifications.

    Each position light color must have the applicable International Commission on Illumination chromaticity coordinates as follows:

    (a) Aviation red -

    y is not greater than 0.335; and

    z is not greater than 0.002.

    (b) Aviation green -

    x is not greater than 0.440−0.320y ;

    x is not greater than y−0.170; and

    y is not less than 0.390−0.170x.

    (c) Aviation white -

    x is not less than 0.300 and not greater than 0.540;

    y is not less than x−0.040; or y0−0.010, whichever is the smaller; and

    y is not greater than x + 0.020 nor 0.636−0.400x;

    Where y0 is the y coordinate of the Planckian radiator for the value of x considered.

    [Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-27, 36 FR 12972, July 10, 1971]