23.1397—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.

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.

Code of Federal Regulations

[Doc. No. 4080, 29 FR 17955, Dec. 18, 1964, amended by Amdt. 23-11, 36 FR 12971, July 10, 1971]