South Korea sends navy assets toward Hormuz, widening Cheonghae anti-piracy mission

Deployment near the strait

South Korea's Defence Ministry announced on Thursday, 5 November 2026, that it will send a maritime patrol aircraft and an explosive ordnance disposal team to waters near the Strait of Hormuz. The stated aim is to help keep the waterway open, which the war between the United States and Iran has disrupted since it began on 28 February. The package also includes a destroyer, unmanned surface vessels and remotely operated vehicles for underwater exploration. Roughly one fifth of the world's oil normally passes through the strait. The decision follows months of deliberation in Seoul over how to respond to Washington, where President Donald Trump has urged the ally to join efforts to secure the waterway.

Expanded anti-piracy unit

The Cheonghae anti-piracy unit has operated in the Gulf of Aden, off the coast of Somalia, since 2009, escorting commercial shipping. Seoul plans to widen its operating area to international waters south of Oman in the Arabian Sea, roughly 650 kilometres from the strait. The new zone takes in waters near the Omani port of Duqm. Personnel would rise by 75, and the unit's operational radius would nearly double to about 1,930 kilometres. The government is seeking parliamentary approval for the expansion, and the proposal must also be approved by President Lee Jae Myung. The unit's current deployment mandate expires at the end of 2026, and the government plans to submit an extension to parliament.

Limits on the mission

An anonymous Defence Ministry official said the deployment is strictly non-combat and that the unit will operate independently of allied forces. Operations will remain limited to open waters south of Oman, and the patrol aircraft will be barred from targeting or monitoring Iranian territory, Iranian territorial waters or the inside of the strait. Seoul has said it will not send troops in a way that could draw it into the war with Iran. Any future intervention in Hormuz would require separate parliamentary approval and adequate security conditions. Mine-clearance equipment is also being considered for possible de-mining operations once hostilities end or after an agreement between Washington and Tehran. Tehran has warned Seoul against any such action.

Political backdrop

President Lee Jae Myung said in mid-September that South Korea would not deploy military assets to the Middle East in a way that could lead to military intervention. He added that Seoul was weighing whether to play a bigger role in ensuring safe navigation in the region. Trump has criticised South Korea for insufficient support in the war with Iran. Earlier in the summer, Trump scaled back large joint military exercises between the two countries, a move that unsettled Seoul, a close US ally.

Oil exposure and key dates

South Korea depends heavily on imported oil. Its industry ministry says 70% of the country's supplies in 2025 came from the Middle East, and most of that flowed through the Strait of Hormuz. The timeline below traces the main milestones from the Cheonghae unit's presence in the Gulf of Aden to Thursday's announcement.

What comes next

Parliament must now consider the proposal to widen the zone and extend the mission, whose current validity runs to the end of 2026. The proposal also needs the approval of President Lee Jae Myung and the government. The reporting gives no date for a parliamentary vote or for when the aircraft, destroyer and explosive ordnance team would reach the area. Any intervention beyond the mission's stated limits would need separate approval.