Delivered and accepted on 31 July 1945, she was fitted with all of the latest armaments and design modifications as a result of lessons learned from previous contracts and battlefield experience.

In this way, PT-658 is a showcase of the final form that motor torpedo boats would take by the end of World War II.

Also during this period, PT-658 served twice a week as a high speed transport, carrying men and supplies to the United States Air Force D.E.W.

[5] On 30 June 1958, PT-658 was sold to a private individual in the Oakland and Alameda, California area and renamed Porpoise.

In 1993, she was donated by the late owner's estate to the veterans of Save the PT Boat, Inc. of Portland, Oregon.

Funding raised for additional restoration work included a $14,000 grant from the Oregon Cultural Trust, awarded in July 2010.

[11] In July 2011, two Mark 50 eight-cell rocket launcher mounts were added to the port and starboard bow.

Further equipment additions added by the crew in 2014 include authentic IFF dipole antennae on the chart house and radar mast, and a US M2 60mm mortar on the starboard side of the bow.