After alterations at Mare Island from 25 October 1946 to 26 July 1947 had made Pomodon the first Greater Underwater Propulsive Power Program (GUPPY) submarine in the Pacific Fleet, the submarine returned to San Diego on 28 July and began operations in the area as part of Task Forces 52 and 56.

On 21 February 1955, while recharging batteries in the San Francisco Naval Yard, a build-up of hydrogen gas caused an explosion and fire, damaging the submarine and killing five men.

Pomodon’s eighth deployment with the Seventh Fleet, 6 June to 30 November 1966, took her to Vietnamese waters and she operated with American destroyers and antisubmarine aircraft carrier USS Kearsarge on Yankee Station.

Training operations on the West Coast and overhaul at the San Francisco Naval Shipyard, filled 1967.

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.