| Year | Date | Historical Events |
| 1942 | Jul 21 | Keel laid down by the Electric Boat Co., Groton, CT. |
| 1943 | Mar 21 | Launched. |
| | Jun 21 | Commissioned with LCDR. James C. Dempsey in command.
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| | Oct 2 | Cod arrived at Brisbane, Australia. |
| | Oct 22 | Cod sailed from Brisbane, Australia for her 1st war patrol to the South China Sea. She contacted few targets and launched only one attack, with unobserved results. |
| | Dec 16 | Cod returned to Fremantle, Australia for refit. |
| 1944 | Jan 11 | Cod departed Fremantle for her 2nd war patrol in the South China Sea off Java and off Halmahea. |
| | Feb 16 | Cod surfaced to sink a sampan by gunfire. |
| | Feb 23 | Cod torpedoed a Japanese merchantman. |
| | Feb 27 | Cod sent another merchantman to the bottom. |
| | Feb 29 | Cod attacked a third merchantman, only to be forced deep by a concentrated depth charging delivered by an alert escort ship.
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| | Mar 13 | Cod returned to Fremantle, Australia for refit. |
| | Apr 6 | Cod departed Fremantle on her 3rd war patrol to the Sulu and South China Seas off Luzon. |
| | May 10 | Cod attacked a convoy of 32 ships and sank the destroyer Karukaya and a cargo ship before the escorts drove her down with depth charges. |
| | Jun 1 | Cod returned to Fremantle, Australia to replenish. |
| | Jul 3 | Cod departed Fremantle, Australia on her 4th war patrol, under the command of CDR. James "Caddy" Adkins. She ranged from the coast of Luzon to Java. |
| | Aug 3 | Cod sank a merchantman. |
| | Aug 14 | Cod sank a landing craft, LSV-129. |
| | Aug 25 | Cod returned to Fremantle, Australia from a successful patrol. |
| | Sep 18 | Cod put to sea on her 5th war patrol bound for the Philippine waters. |
| | Oct 5 | Cod made her first contact, a cargo ship, and sent it to the bottom. |
| | Oct 7 | Cod inflicted heavy damage on a tanker. |
| | Oct 25 | Contacting a large convoy, Cod launched several attacks without success. With all her torpedoes expended, she continued to shadow the convoy for another day to report it's position. |
| | Nov 1 | Cod took up lifeguard station off Luzon, ready to rescue carrier pilots carrying out air strikes on Japanese bases which paved the way for the invasion of Leyte later that month. |
| | Nov 20 | Cod returned to Pearl Harbor, HI., and sailed on to a stateside overhaul. |
| 1945 | Mar 7 | Cod returned to Pearl Harbor, HI. after overhaul. |
| | Mar 24 | Cod sailed for the East China Sea on her 6th war patrol. Assigned primarily lifeguard duty. |
| | Apr 17 | Cod used her deck gun to sink a tug and it's tow. |
| | Apr 18 | She sent the minesweeper W-41 to the bottom. |
| | Apr 24 | Cod launched an attack on a convoy which resulted in the most severe depth charging of her career. |
| | Apr 25 | Cod sent the minesweeper W-41 to the bottom. |
| | Apr 26 | Cod was threatened by a fire in the after torpedo room, but was saved by the heroism and skill of her men who fought the fire under control and manually fired a torpedo already in it's tube before the fire could detonate it. One man was lost overboard. |
| | May 29 | Cod returned to Guam, Marianas Island, for refit. |
| | Jun 26 | Cod put out for the Gulf of Siam and the coast of Indo-China on her 7th war patrol under the command of LCDR. Edwin M. Westbrook, Jr. |
| | Jul 9 | Cod went to the rescue of the grounded Dutch submarine, O-19, taking it's crew on board and destroying the Dutch boat when it could not be gotten off the reef. This was the only international submarine-to-submarine rescue in history. |
| | Jul 29 | After returning the Dutch sailors to Subic Bay, between 21 July and 1 August, Cod made 20 gunfire attacks on the junks, motor sampans, and barges which were all that remained to supply the Japanese at Singapore. |
| | Jul 29 | (Cont'd.) After inspecting each contact to rescue friendly natives, Cod sank it by gunfire, sending to the bottom a total of 23. |
| | Aug 1 | An enemy plane strafed Cod forcing her to dive, leaving one of her borading parties behind. These men were rescued 2 days later by Blnny (SS-324). |
| | Aug 13 | Cod returned to Fremantle, Australia, the crew of O-19 was waiting to throw a party for her. The two crews learned of the Japanese surrender. To symbolize that happy moment, another symbol was added to Cod’s battle. The name O-19 under a martini glass. |
| | Aug 31 | Cod sailed for home. |
| | Nov 3 | Cod arrived at New London, CT. after a visit to Miami, FL. She then sailed to the Philadelphia Naval Shipyard, Philadelphia, PA. for overhaul. |
| 1946 | Jun 22 | Cod returned to New London, CT. where she was decommissioned and placed "In Reserve". |
| 1951 | Jan 1 | Cod was recommissioned, under the command of CAPT. Francis E. Rich, to participate in NATO anti-submarine training exercises. Her Cold War voyages took Cod to St. John's Newfoundland, as well as ports in Cuba and South America. |
| 1952 | Jan 1 | During LANTFLEX '52 fleet exercise, Cod was credited with "sinking" a U.S. aircraft carrier.
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| 1954 | Jan 1 | Cod was decommissioned and placed "In Reserve". |
| 1959 | Jan 1 | Cod was towed through the newly opened St. Lawrence Seaway to serve as a Naval Reserve training vessel in Cleveland, Ohio. |
| 1976 | May 1 | Cod began her career as a floating memorial when she opened for public tours and quickly established herself as a popular tourist attraction. |