The vessels, which had been waiting inside the strait, completed their passage and are now sailing normally, the Ministry of Oceans and Fisheries said.
A total of 26 South Korean crew members are aboard the four ships. One of the vessels is bound for South Korea.
The latest departures came after two other ships run by South Korean carriers left the strait under the U.S.-Iran agreement, reducing the number of Korea-related vessels remaining inside the waterway to 18.
A total of 108 South Korean seafarers remain in the area, including 75 aboard ships operated by South Korean carriers and 33 aboard foreign vessels.
The ministry said it would continue providing the remaining 18 vessels with updates and transit information to help shipping companies draw up their own sailing plans and ensure safe passage.
Ships stranded in the area because of the Middle East war have begun leaving the Strait of Hormuz following the U.S.-Iran agreement, with more Korea-operated vessels expected to follow in stages.
The two ships that earlier left the strait were identified as HMM’s 16,000-TEU container ship Daon and the very large crude carrier Universal Glory.
HMM said Wednesday that both ships had safely cleared the strait and were continuing their voyages.
The Universal Glory, carrying 2 million barrels of crude oil, is expected to arrive at Yeosu Port in mid-July.
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