[Code of Federal Regulations]
[Title 33, Volume 1]
[Revised as of July 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR66.01-11]
[Page 156-157]
TITLE 33--NAVIGATION AND NAVIGABLE WATERS
CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
PART 66_PRIVATE AIDS TO NAVIGATION--Table of Contents
Subpart 66.01_Aids to Navigation Other Than Federal or State
Sec. 66.01-11 Lights.
(a) Except for range and sector lights, each light approved as a
private aid to navigation must:
(1) Have at least the effective intensity required by this subpart
omnidirectionally in the horizontal plane, except at the seams of its
lens-mold.
(2) Have at least 50% of the effective intensity required by this
subpart within 2[deg] of the horizontal plane.
[[Page 157]]
(3) Have a minimum effective intensity of at least 1 candela for a
range of 1 nautical mile, 3 candelas for one of 2 nautical miles, 10
candelas for one of 3 nautical miles, and 54 candelas for one of 5
nautical miles. The District Commander may change the requirements for
minimum intensity to account for local environmental conditions. For a
flashing light this intensity is determined by the following formula:
Ie=G/(0.2+t2-t1)
Where:
Ie = Effective intensity
G = The integral of the instantaneous intensity of the flashed light
with respect to time
t1 = Time in seconds at the beginning of the flash
t2 = Time in seconds at the end of the flash
t2-t1 is greater than or equal to 0.2 seconds.
(4) Unless the light is a prefocused lantern, have a means of
verifying that the source of the light is at the focal point of the
lens.
(5) Emit a color within the angle of 50% effective intensity with
color coordinates lying within the boundaries defined by the corner
coordinates in Table 66.01-11(5) of this part when plotted on the
Standard Observer Diagram of the International Commission on
Illumination (CIE).
Table 66.01-11(5)--Coordinates of Chromaticity
------------------------------------------------------------------------
Coordinates of
chromaticity
Color -------------------
x axis y axis
------------------------------------------------------------------------
White............................................... 0.500 0.382
0.440 0.382
0.285 0.264
0.285 0.332
0.453 0.440
0.500 0.440
Green............................................... 0.305 0.689
0.321 0.494
0.228 0.351
0.028 0.385
Red................................................. 0.735 0.265
0.721 0.259
0.645 0.335
0.665 0.335
Yellow.............................................. 0.618 0.382
0.612 0.382
0.555 0.435
0.560 0.440
------------------------------------------------------------------------
(6) Have a recommended interval for replacement of the source of
light that ensures that the lantern meets the minimal required intensity
stated in paragraph (a)(3) of this section in case of degradation of
either the source of light or the lens.
(7) Have autonomy of at least 10 days if the light has a self-
contained power system. Power production for the prospective position
should exceed the load during the worst average month of insolation. The
literature concerning the light must clearly state the operating limits
and service intervals. Low-voltage disconnects used to protect the
battery must operate so as to prevent sporadic operation at night.
(b) The manufacturer of each light approved as a private aid to
navigation must certify compliance by means of an indelible plate or
label affixed to the aid that meets the requirements of Sec. 66.01-14.
[USCG-2000-7466, 68 FR 68238, Dec. 8, 2003]