Mich. Admin. Code R. 281.1233 - Navigation lights; intensity standards; placement; screening

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

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Notes

Mich. Admin. Code R. 281.1233