It took 12 hours to finally sink, 55 miles north of Kaui

Thach was hit with over 5,000 pounds of high explosives July 14

First launched in 1982, Thach was retired in 2013

Decomissioned ships are stripped of their weapons and fuel and used for target practice by the US, Canada, Australia, and the Republic of Korea

The exercise, known as SINKEX,

It was a retired war ship hit with over 5,000 pounds of high explosives.

However the USS Thach, which was bombarded from the air, sea, and even underwater last Thursday during a missile-testing exercise, did not go down without a fight, taking 12 hours to finally sink to the bottom of the Pacific Ocean.

The Rim of the Pacific Exercise, also known as SINKEX or the sinking exercise, takes place every two years, and involves stripping an old frigate of its weapons, ammunitions and fuel.

It is then used for Navy target practice, with ships, submarines and aircraft from the US, Canada, Australia, and the Republic of Korea all taking aim.

Boom: Video taken of the exercise shows the moment ship was first hit with a harpoon missile from a South Korean submarine

Resilent: The USS Thach, which launched in 1982 and was retired in 2013, turned out to be quite hardy

After being blasted with over five thousand pounds of high explosives, the ship took 12 hours to finally sink

But the latest, the USS Thach, which was retired in 2013, turned out to be quite hardy.

The ship was towed to an area 55 miles north off the coast of Kaui and then bombarded.

According to Popular Mechanics, the ship was first hit with a harpoon missile from a South Korean submarine.

Next, the Australian frigate HMAS Ballarat launched another Harpoon, and an Australian SH-60S helicopter shot it with a Hellfire missile.

The US maritime patrol aircraft then hit it with Harpoon and Maverick missiles.

However that was merely the beginning.

The cruiser USS Princeton then hit it with yet another Harpoon missile, while an American SH-60S Navy chopper hit it with more Hellfires.

US Navy F/A-18 Hornets also dropped a 2,000 pound Mk. 84 bomb and a US Air Force B-52 bomber dropped a GBU-12 Paveway laser guided 500 pound bomb.

A US Navy submarine got into the action, striking it with a Mk. 48 torpedo.

The ship was used for target practice, with ships, submarines and aircraft from the US, Canada, Australia, and the Republic of Korea all taking aim

The SINKEX, or sinking exercise, takes place every two years, and involves stripping an old frigate of its weapons, ammunitions and fuel, and then sinking it during target practice

Video taken by a helicopter shows the varying hits the ship put up with, as well as the damage afterwards.

WHAT IS A SINKEX? A SINKEX, or sink exercise, is a multinational maritime exercise that takes place in and around the Hawaiian Islands and off the coast of southern California every two years. This year's RIMPAC exercise, the 25th in the series that began in 1971, started with the sinking of the USS Thach on July 14, featuring hips, submarines and aircraft from the U.S., Canada, Australia, and the Republic of Korea. The exercise will continue this week. Advertisement

The USS Thach finally sank at 7:25 p.m. on July 14 in waters 15,000 feet deep.

As per SINKEX procedures, each ship must go down in at least 6,000 feet of water and at least 50 nautical miles from land.

'This SINKEX was a tremendous event for all the units who participated. As you can imagine, the opportunity to fire live ordnances at a real target is incredibly rare and I know that these men and women learned so much today,' Royal Canadian Navy Rear Adm. Scott Bishop, deputy commander of the RIMPAC Combined Task Force, said.

'This kind of training is vital to strengthening our interoperability and increasing our readiness for operations in the future.'

Damage: This shot from the scene video shows the damage done to the ship during the bombardments

Explosive: The ship withstood a huge amount of damage, as seen here at the helicopter pad at the back

The decommissioned USS Thach was the 34th ship of the Oliver Hazard Perry-class guided missile frigates.

The ship was named for Naval aviator Adm. John S. Thatch, the developer of the 'Thach Weave', a dogfighting tactic in World War II and former Commander, U.S.

The shop was built by the Todd Pacific Shipyards in San Pedro, California and launched in December 1982.

In late 2006 while deployed to the Southern Pacific, Thach caught fire as she attempted to put out a fire on a drug smuggling ship.

It was then decommissioned in San Diego on November 1, 2013