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}} Poe Reef is a lighthouse located at the east end of South Channel between Bois Blanc Island and the mainland of the Lower Peninsula, about east of Cheboygan Poe Reef has historically caused problems for shipping. Powered vessels heading west to Lake Michigan generally use South Channel, which is approximately three nautical miles wide, but Poe Reef sits close to the middle of the channel and to the north of it the water is too shallow for lake freighters. ==History== Many attempts were made to position a lightship here〔 but it was difficult. Four different lightships served beginning in 1893:〔(Roach, Jerry, Lighthouse Central, Poe Reef Light ''The Ultimate Guide to East Michigan Lighthouses'' ) (Publisher: Bugs Publishing LLC - July 2006). ISBN 0-9747977-1-5; ISBN 978-0-9747977-1-7.〕 Lightships Nos. 62, 59, 96, and No. 99.〔 The Poe Reef Light was an extension of the effort—beginning in 1870 through 1910—where engineers began to build lights on isolated islands, reefs, and shoals that were significant navigational hazards. To that time, Light ships were the only practical way to mark the hazards, but were dangerous for the sailors who manned them, and difficult to maintain. "Worse, regardless of the type of anchors used lightships could be blown off their expected location in severe storms, making them a potential liability in the worst weather when captains would depend on the charted location of these lights to measure their own ship's distance from dangerous rocks."〔(''Beacons in the Night'', Clarke Historical Library. ) Central Michigan University.〕〔Hyde, Charles K., and Ann and John Mahan. The Northern Lights: Lighthouses of the Upper Great Lakes. Detroit: Wayne State University Press, 1995. ISBN 0-8143-2554-8 ISBN 9780814325544.〕 ''See'', United States lightship Huron (LV-103). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Poe Reef Light」の詳細全文を読む スポンサード リンク
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