"The Progress MS-31 cargo spacecraft undocks from the International Space Station on Monday, March 16, after spending 255 days on the station. It previously delivered fuel, water, scientific gear, crew supplies and other essential cargo needed to support life aboard the orbiting laboratory. The departure of Progress MS-31 frees up the docking port ahead of the scheduled launch of Progress MS-33 from the Baikonur Cosmodrome on March 22."