During the American Civil War she was acquired by the Union Navy, which used her as part of the stone fleet of obstructions of the ports and waterways of the Confederate States of America.

Refitted during the winter of 1806-07, she set a record of 14 days on an eastbound run from Cape Henlopen, Delaware, to the mouth of the River Mersey (Liverpool, England) in May 1807.

She is also known for capturing the wounded sperm whale responsible for the sinking of the Ann Alexander off the coast of the Galapagos Islands.

The whaler was stripped of all unnecessary equipment; filled with stone; and, under the command of her previous master, James M. Willis, sent south in late November.

In early December, she arrived off Savannah, Georgia, whence, at mid-month, she proceeded to Port Royal, South Carolina.