From the April 29, 2013, Bernews.
Bermuda's Department of Conservation Service and the Bermuda Underwater Exploration Institute offer guided tours of the wreck of a ship of many names: Nola, Gloria, Paramount and Montana.
It was built in Glasgow, Scotland, and was a 236-foot long paddle wheel steamer capable of 15 knots. It hit a shallow reef off Bermuda and sank in December 1863. The ship is located in 30 feet of water and ius partially intact.
Of 71 blockade-runners operating in and out of Bermuda, the Union Navy had captured or sunk 43 by 1864.
The Montana wreck consists of two boilers and twp paddle wheel frames lying on their sides. Its site is alongside the Constellation, a World War II ship wreck that inspired Peter Benchley's Bermuda thriller "The Deep."
So, not only did blockade-runners have to worry aboout Union ships, but also reefs, shallow water and other situations.