Michigan Administrative Code
Department - Natural Resources
Law Enforcement Division
Associated Equipment on Vessels
Section R. 281.1233 - Navigation lights; intensity standards; placement; screening
Current through Vol. 24-04, March 15, 2024
Rule 3.
(1) Navigation lights shall be of sufficient intensity so that the candlepower outside the lens is not less than that amount corresponding to the required distance of visibility as indicated in table 1.
TABLE 1
| Distance of Visibility | |
| In Nautical Miles | Candlepower |
| 1 | 1.0 |
| 2 | 5.5 |
| 3 | 17.6 |
| 5 | 100.0 |
(2) As an aid in complying with this rule, the standard double contact bayonet candelabra base lamps listed in table 2 are recommended for motorboats having 6- to 32-volt electrical systems.
TABLE 2
| Distance of Visibility in Nautical Miles | Color | Lamp Number for Certain Voltage Systems | |||||
| With Fresnel Lens | Without Fresnel Lens | ||||||
| 6 | 12 | 32 | 6 | 12 | 32 | ||
| 1 | Red | 82 | 90 | 1,226 | 1,130 | 1,142 | 1,230 |
| 1 | Green | 88 | 94 | 1,228 | |||
| 2 | White | 64 | 68 | 1,224 | 82 | 90 | 1,226 |
| 3 | White | 82 | 90 | 1,226 | 1,130 | 1,142 | 1,230 |
(3) As an aid in complying with this rule, the incandescent lamps listed in table 3 are recommended for vessels having 115 volt electrical systems.
TABLE 3
| Distance of Visibility in Nautical Miles | Color | Wattage | |
| With Fresnel Lens | Without Fresnel Lens | ||
| 1 | Red | 25 | |
| 1 | Green | 25 | 50 |
| 2 | White | 15 | |
| 2 | Amber | 25 | |
| 2 | Red | 40 | 100 |
| 2 | Green | 75 | 200 |
| 3 | White | 25 | |
| 3 | Amber | 25 | 75 |
| 5 | White | 40 | 100 |
(4) The light intensity standards of this rule shall apply to new navigation lights installed and replacements of existing lights made on and after January 1, 1973.
(5) Navigation lights required by these rules shall be placed high enough that their light will not be obstructed by persons or parts of the boat or its equipment and shall be screened as indicated in figure 1.
Figure for 281.1233
