33 CFR 84.15 - Intensity of lights.
I=3.43×106 ×T×D2 ×K−D
I: Luminous intensity in candelas under service conditions,
T: Threshold factor 2×10−7 lux,
D: Range of visibility (luminous range) of the light in nautical miles,
K: Atmospheric transmissivity. For prescribed lights the value of K will be 0.8, corresponding to a meteorological visibility of approximately 13 nautical miles.
|Range of visibility (luminous range) of light in nautical miles D||Minimum luminous intensity of light in candelas for K=0.8 I|
Title 33 published on 2013-07-01
no entries appear in the Federal Register after this date.