The HC Opal, operated by Danish company Ocean 7 Projects and managed by Germany’s Marlow Navigation Co. Ltd., offloaded at least 10 tonnes of Hexachloroethane at Haifa port on 4 June. Hexachloroethane is a military chemical, which the Israel Military Industries (IMI) uses to produce its M150 155 mm artillery gun projectile.

Hexachloroethane was consigned to IMI Systems, a fully owned subsidiary of Elbit Systems, Israel’s largest arms manufacturer. The offloaded substance is a key component in the M150 155mm artillery shell, crucial weapon in the genocide in Gaza and very commonly used by the Israeli military in other ground invasions, such as in Lebanon.

On 29 May, Antigua and Barbuda had issued an official maritime directive explicitly prohibiting vessels flying its flag from transporting arms or military equipment to conflict zones. The HC Opal subsequently went dark. Its Automatic Identification System (AIS) was disabled on the very same day.

Evidence of the cargo’s unloading in Israel, indicates that the vessel re-emerged on radar only on 5 June, by which time the military cargo had already been discharged. Further evidence of cargo unloading is shown by the vessel’s decreased draught—1.6 meters less than when it was last visible—indicating a significant reduction in onboard weight consistent with unloading large quantities of cargo.

“Going dark’ is in violation of the obligations under international maritime conventions, including obligations under the jurisdiction of Antigua and Barbuda” said No Harbour for Genocide initiative, a campaign that brings together various civil society groups, human rights organisations, and legal experts. “While these actions might mask public scrutiny on the vessel’s movement, they strengthen the case for holding the captain, operators, insurer and owners of the HC Opal accountable in the transport of military illegal material.”