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US, ROK Conduct Exercise Silent Shark

23 October 2023

From Petty Officer 1st Class Justin Wolpert

ROK Sonwonil-class submarine ROKS Jeong Ji (SS 073) arrives at U.S. Naval Base Guam for Silent Shark 2023. The U.S. and Republic of Korea (ROK) navies completed the biennial combined theater anti-submarine warfare exercise Silent Shark in the vicinity of Guam, Oct. 22.

Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), looks through a periscope aboard the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) during a routine  visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), looks through a periscope aboard the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) during a routine visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), looks through a periscope aboard the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) during a routine  visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
231004-N-VC599-1057
Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), looks through a periscope aboard the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) during a routine visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Photo By: Petty Officer 1st Class Justin Wolpert
VIRIN: 231004-N-VC599-2057


The Los Angeles-class fast-attack submarine USS Topeka (SSN 754) and Sonwonil-class diesel-electric submarine ROKS Jung Ji (SS 073), along with maritime patrol and reconnaissance aircraft from the “Fighting Tigers” of Patrol Squadron (VP) 8 and ROK Navy squadron 611, participated in the exercise to increase interoperability between the navies in the undersea domain and to provide opportunities to enhance the use of submarine tracking and engagement as a tool to maintain stability throughout the Western Pacific region.

"We significantly increased our ability to carry out joint operations for TASW through fierce, realistic training," said Cmdr. Kim Il-bae, commanding officer, ROKS Jung Ji. "We will deter enemy aggression and are ready to firmly defend our seas."

Sailors assigned to the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) hold signs to welcome the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) as it arrives at U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Sailors assigned to the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) hold signs to welcome the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) as it arrives at U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
The Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) moors at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
The Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) moors at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Sailors assigned to the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) prepare to moor at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Sailors assigned to the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) prepare to moor at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)


The exercise reflects the United States’ commitment to the Indo-Pacific region, and complements the many exercises, training, operations and other military cooperation activities conducted by U.S. submarine forces with the Republic of Korea navy.

“These combined training events maintain our readiness at a high level,” said Cmdr. James Fulks, commanding officer, USS Topeka. “Our increasing interoperability with ROK submarines promotes democracy and provides security for the region.”

Cmdr. James Tuthil, left, commanding officer of the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760), welcomes Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) to U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Cmdr. James Tuthil, left, commanding officer of the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760), welcomes Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) to U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
A performer from the Guam Visitors Bureau cultural dance troupe presents a gift to Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), after the submarine arrives at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
A performer from the Guam Visitors Bureau cultural dance troupe presents a gift to Cmdr. Ilbae Kim, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), after the submarine arrives at U.S. Naval Base Guam, Sept. 28, 2023. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Sailors assigned to the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) and the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) pose for a group photo after the submarine arrives at U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Sailors assigned to the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) and the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073) pose for a group photo after the submarine arrives at U.S. Naval Base Guam, Sept. 28, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Leadership for the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) and the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), pose for a photo on the Annapolis’ brow during a visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Leadership for the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) and the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), pose for a photo on the Annapolis’ brow during a visit, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Cmdr. Ilbae Kim, left, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), and Cmdr. James Tuthill, commanding officer of the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760), exchange gifts during a visit aboard Annapolis, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)
Cmdr. Ilbae Kim, left, commanding officer of the Republic of Korea Navy Sonwonil-class submarine ROKS Jeong Ji (SS 073), and Cmdr. James Tuthill, commanding officer of the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760), exchange gifts during a visit aboard Annapolis, Oct. 4, 2023. Annapolis is one of multiple submarines assigned to Commander, Submarine Squadron (CSS) 15. Annapolis is capable of supporting various missions, including anti-submarine warfare, anti-ship warfare, strike warfare, intelligence, surveillance, and reconnaissance. (U.S. Navy photo by Mass Communication Specialist 1st Class Justin Wolpert)


Jung Ji also executed several scheduled port visits at U.S. Naval Base Guam, where the Los Angeles-class fast-attack submarine USS Annapolis (SSN 760) served as the host vessel.

During the in-port periods, the ROK submarine’s leadership spoke with various area commanders including Capt. Carl Trask, commander, Submarine Squadron 15, and Capt. Brent Spillner, commanding officer of the Emory S. Land-class submarine tender USS Emory S. Land (AS 39). Additionally, Jung Ji’s crew practiced seamanship and tactical maneuvers in the submarine trainer at Naval Submarine Training Center Pacific Detachment Guam, hosted tours of their vessel, toured Annapolis, and explored the local area.

Silent Shark has been conducted biennially since 2007. This year marks the 70th anniversary of the U.S-ROK alliance.

Commander, Submarine Group 7 directs forward-deployed, combat-capable forces across the full spectrum of undersea warfare throughout the Western Pacific, Indian Ocean and Arabian Sea.

U.S. 7th Fleet is the U.S. Navy's largest forward-deployed numbered fleet, and routinely interacts and operates with allies and partners in preserving a free and open Indo-Pacific region.

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