One of Iran’s newest warships capsized in port over the weekend while undergoing repairs, an incident that could damage key warfighting systems and put the ship out of commission for up to half a year, a naval analyst said.

The 311-foot-long frigate Sahand was at a dock in the port of Bandar Abbas when it “lost its balance” after water leaked into its tanks, according to a report from the state-run Islamic Republic News Agency (IRNA).

A photo from the semi-official Tasnim News Agency showed the warship, with a displacement of about 2,000 tons, resting on its left side in the Bandar Abbas port.

The ship, which Tasnim said entered service in December 2018, is one of the bigger vessels in Iran’s fleet, equipped with antiship cruise missiles and an electronic warfare system.