—Dry Tortugas National Park —The 8- and 10-inch columbiads were standard U.S. cannon for coast defense. They were cast-iron, muzzle-loading smoothbores. The 8-inch weighed 9,210 pounds and when elevated 4" threw a 65-pound ball about a mile. From the top of the fort, the 10-inchers, 400 pounders could be elevated to 39" and throw a 128-pound shell over three miles.
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|Placed By||National Park Service, US Department of Interior|
|Marker Condition||No reports yet|
|Date Added||Wednesday, December 7th, 2016 at 9:01am PST -08:00|
|UTM (WGS84 Datum)||17R E 310428 N 2725038|
|Decimal Degrees||24.62790000, -82.87280000|
|Degrees and Decimal Minutes||N 24° 37.674', W 82° 52.368'|
|Degrees, Minutes and Seconds||24° 37' 40.44" N, 82° 52' 22.08" W|
|Driving Directions||Google Maps|
|Closest Postal Address||At or near Unnamed Road, Key West FL 33040, US|
|Alternative Maps||Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap|