South Korea weighs expanding Cheonghae Unit's operational range toward Strait of Hormuz

South Korea's Ministry of National Defense is reviewing a plan to expand the Cheonghae Unit's operational range from the Gulf of Aden off Somalia to the Gulf of Oman near the Strait of Hormuz. The review also includes reinforcing assets such as maritime patrol aircraft. Experts say the geographic position of the Gulf of Oman means the unit would in effect be extending its reach to the entrance of the Strait of Hormuz.

According to the military Friday, the Defense Ministry is examining the plan ahead of submitting to the National Assembly a bill to extend the dispatch of South Korean forces to the Gulf of Aden off Somalia.

The Cheonghae Unit has been deployed to the Gulf of Aden off Somalia since 2009, conducting anti-piracy operations and providing escort and safe-passage support for vessels.

The Defense Ministry cited a rise in piracy and a deteriorating security situation in the Gulf of Aden as the backdrop for the review. "It is true that piracy in the Gulf of Aden off Somalia has surged sharply compared with previous years and that the security situation in the area has worsened," a Defense Ministry official said.

The official added that "the Cheonghae Unit is carrying out the missions specified in the dispatch consent bill in the Gulf of Aden off Somalia, and those missions are set to conclude on Dec. 31, 2026," and that "the government is reviewing the submission of an extension bill before the current dispatch mandate expires, but no details have been decided."

The ministry indicated the move stems from the Cheonghae Unit's existing mission and conditions on the ground, rather than from a US request to deploy forces to the Strait of Hormuz.

However, given the geographic realities, it appears difficult to frame an expansion of the unit's operational range purely as a strengthening of anti-piracy duties.

The Gulf of Oman connects directly to the Strait of Hormuz, and beyond the Gulf of Oman lies the Arabian Sea.

Yoo Ji-hoon, a research fellow at the Korea Institute for Defense Analyses (KIDA), said the Gulf of Oman "is a strategic chokepoint directly linked to the Strait of Hormuz and a sea area closely tied to the military confrontation between the United States and Iran," adding that "an expansion of the Cheonghae Unit's operational range also carries the character of an indirect military contribution aimed at responding to the security situation in the Strait of Hormuz."

Yoo added that if the operational expansion is accompanied by a review of reinforcing surveillance and reconnaissance assets such as maritime patrol aircraft, "there is a possibility that the mission could broaden beyond existing anti-piracy and merchant vessel protection to encompass monitoring of sea lanes, collection of threat intelligence, and support for navigational safety." He added that "this measure leaves room for interpretation as a form of 'roundabout deployment to the Strait of Hormuz.'"

The extension bill is also said to potentially include a conditional clause stipulating that operations near the Gulf of Oman would begin only after the end of the war between the United States and Iran. However, the condition of "end of war" leaves room for varying interpretations — including a truce, a cessation of hostilities, or a formal end to the conflict.

Yoo warned that "if the mission and scope of activities remain unclear while the war continues, the risk of becoming entangled in unintended military clashes cannot be ruled out." He urged South Korea to "maintain the principle of non-involvement in the war while practically securing the safety of our vessels and sea lanes, and strike a balance between cooperation within the framework of the South Korea-US alliance and independent maritime security interests."