Arriving Sasebo early in 1946, she stripped 39 Japanese submarines of all usable equipment and material before they were towed to sea for scuttling.

Soon underway for home, she arrived in San Diego, California, on 13 May for a year of submarine service and repair work.

On 15 July she left for the Aleutian Islands where Rear Admiral Alan R. McCann, Commander Submarine Force Pacific came aboard.

Following along the International Date Line, the ships of Operation Blue Nose sighted pack ice on the morning of 1 August 1947.

Before returning to her home port of San Diego, Nereus visited Norton Bay, Kodiak, Juneau, and Vancouver The cruise was followed by the ship's first overhaul, at Mare Island.

He expected to hoist his flag aboard cruiser Saint Paul for the exercises, involving 20,000 men, 30 ships and hundreds of planes.

“The fleet will concentrate on testing new weapons and techniques, Murray said.”[1] During the next two decades, Nereus made occasional cruises to Pearl Harbor; to Acapulco, Mexico; and various west coast ports.

Nereus was later decommissioned in 1971,[2] and, as of July 2012, it was to leave the Maritime Administration’s Reserve Fleet at Suisun Bay to be broken apart at ESCO Marine Inc. in Brownsville, Texas (USA), after being scrubbed of marine growth & loose exterior paint in the dry docks of Allied Defense Recycling (California Dry Dock Solutions) at Mare Island.