Nantucket Range Lights
Encyclopedia
The Nantucket Range Lights formed a range
Leading lights
Leading lights are a pair of light beacons, used in navigation to indicate a safe passage for vessels entering a shallow or dangerous channel; and may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation...

 established to guide vessels down the narrow channel into Nantucket Harbor. They were a predecessor to the current Nantucket Harbor Range Lights
Nantucket Harbor Range Lights
The Nantucket Harbor Range Lights are range lights which were built in 1908 to guide vessels through the narrow channel to Nantucket Harbor. They replaced an older arrangement, known as Nantucket Range Lights, which became unusable when the current Brant Point Light replaced the 1856 Brant Point...

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The front light was the then current tower of Brant Point Light
Brant Point Light
Brant Point Light is a lighthouse located on Nantucket Island. It was established in 1746, automated in 1965, and is still in operation. The light station was added to the National Register of Historic Places on October 28, 1987. It has the distinction of being the tenth light on the point, in...

, built in 1856. The rear light, beginning in 1869 was a wood structure "on rising ground, about one mile in rear of Brant Point lighthouse, which could be moved to accommodate changes in the location of the channel." Before that it was a light in the keeper's hut..
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