46 CFR § 26.03-10
Signaling light
April 15, 2021
All vessels of over 150 gross tons, when engaged on an international voyage, shall be equipped with an efficient daylight signaling lamp in accordance with the requirements of subchapter J (Electrical Engineering) of this chapter.
[CGFR 68-32, 33 FR 5711, Apr. 12, 1968, as amended by CGD 97-057, 62 FR 51042, Sept. 30, 1997]