Over the next two years, she completed twelve war patrols in the Pacific and was credited with sinking 16 enemy ships, totaling 64,655 tons.

Codebreaker warning[further explanation needed] had put Tinosa in a perfect position to shoot the tanker with a spread of four torpedoes.

"[7] When, upon inspection, nothing obvious was found wrong with that last torpedo, Commander Swede Momsen suggested conducting tests on actual warshots by firing them against the cliffs of Kahoolawe, a small island south of Maui from the submarine USS Muskallunge.

A glancing blow, however, would result in the proper behavior (which is why Daspit's first two torpedoes, fired at less optimum track angle, did explode).

One involved recycling a very light metal alloy that had been melted down from the engine of a Japanese airplane that had crashed on Oahu during the bombing of Pearl Harbor.

Even then it wasn't until 24 July when Admiral Nimitz ordered that the influence exploders be disabled on all Pacific Fleet submarines.

This set the stage for Dan Daspit, USS Tinosa and the Tonan Maru to show that the contact exploder was defective as well, as described above.

Four depth charges exploded nearby, springing open lockers and knocking men off their feet in the aft torpedo room.

The entire action took only five minutes and left her between two mortally stricken ships, her position clearly marked by torpedo wakes leading out ahead and astern—a perfect fix for the enemy escorts.

A short time later, four depth charges exploded close by the submarine, knocking out her planes, gyro, steering, internal communications, and other equipment.

During an attack on a convoy on 26 November, Tinosa sank Japanese cargo ship Shini Maru and then dodged 34 depth charges, none of which caused her any damage.

She emerged from this encounter with a torpedo stuck in her number 5 tube but managed to remedy the problem and headed for the Molucca Passage-Palau traffic lanes.

At 21:01 while maneuvering on the surface as she sought to finish off the Azuma Maru, Tinosa came under fire from the burning vessel; and, minutes later, she narrowly avoided being rammed by the crippled enemy ship which circled out of control because of a damaged rudder.

In company with Parche (SS-384) and Bang (SS-385), Tinosa got underway for the East China Sea and her sixth patrol on 29 March.

Operating off Japan and the Ryukyus, this wolf pack preyed successfully on passing convoys by stationing units along well-traveled routes.

Tinosa closed the enemy vessel, doused her with fuel oil, and set her ablaze by tossing flaming, oil-soaked rags on her deck.

Shortly after dawn on 2 July, Japanese planes and patrol vessels forced Tinosa to go deep near Nagasaki and kept her down until dusk.

Following this patrol, Tinosa reported to Hunters Point Naval Shipyard, California, on 7 August, for a much needed overhaul.

Tinosa departed San Diego on 7 November 1944 and proceeded, via Pearl Harbor, to Nansei Shoto to reconnoiter its waters and to test new FM sonar equipment in locating Japanese mines.

Despite unexplained damage in her bow-plane rigging gear, Tinosa proceeded to the Nansei Shoto area and resumed testing the mine-detecting capabilities of her temperamental FM sonar.

Although there was no opportunity to attack enemy shipping during this patrol, Tinosa bombarded a Japanese installation on Ulul Island on the night of 14 May.

Acting on this special mission as a member of a wolf pack selected to initiate Operation Barney, an incursion into the Sea of Japan, Tinosa accomplished the dangerous task of plotting mines in Tsushima Strait on 6 June.

This patrol is dramatized in the 1950's TV series, The Silent Service, produced by Universal Television and hosted by RADM Thomas M Dykers, USN (Ret).

Following the completion of this special mission, Tinosa made six aggressive torpedo attacks, sank three cargo ships, and—during the daylight hours of 12 June—launched a brilliant surface battle against the Keito Maru, a Japanese sea truck.