středa 4. listopadu 2015

USA - Big Sable Point Lighthouse

The Big Sable Point Light is a lighthouse on the eastern shore of Lake Michigan near Ludington in Mason CountyMichigan, at the Ludington State Park. It is an active aid to navigation.
Year first constructed1867
Year first lit1867
Automated1968
FoundationWood pilings
Constructionoriginally Cream City brick, later encased incast iron plate
Tower shapeFrustum of a Cone
Markings / patternWhite and black tower/Black parapet & Lantern
HeightTower - 112 feet (34 m)
Focal height106 feet (32 m)
Original lensThird order Fresnel lens
Current lens12-inch (300 mm) ML-300Tideland Signal acrylic optic
Range15 nautical miles (28 km; 17 mi)
CharacteristicWhite, fixed light. Obscured from 238° to 346°.
ARLHS number
USA-054

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