USS Shepherd Knapp
USS Shepherd Knapp was a large (838-ton) ship with eight guns, purchased by the Union Navy during the beginning of the American Civil War.
With her eight guns and a crew of 93, she was employed by the Union Navy as a heavy gunboat outfitted to pursue major Confederate States of America blockade runners, especially Confederate Captain Raphael Semmes. Her limited ability as a sailing ship in pursuit of steam-powered adversaries was eventually recognised and a different strategy adopted: she became a decoy, disguised as an unarmed merchant ship sailing in areas where Confederate raiders were known to operate.
During the course of her fruitless searches for Semmes, she ran aground on a reef near Haiti and was abandoned.