Satellite imagery shows the Ursa Major's likely cargo on the dock of the St. Petersburg port it later departed

The apparent cargo is a pair of blue squares and two white objects, at least one of which is pill-shaped. The white objects fit the profile of nuclear reactor pressure vessels, although they can't be directly compared with the VM-4SG reactor type indicated by the Spanish investigation, as its dimensions have not been disclosed. A week later they were gone, presumably loaded onto the ship.