Very old US light switches often had both AC and DC current ratings, and the DC rating was noticeably lower due to the arcing problem, even with fast-acting snap action.
My grandfather worked in a Chicago office building that had 110V DC service even into the 1960s. He had to be careful to buy fans, radios, etc. that could run on DC.
The dissolution of the Soviet Union brought up a question of headquarters relocation to Novorossiysk. In September 1994 Novorossiysk Naval area was reestablished, three years later it was officially reorganised into Novorossiysk Naval Base.[62] To ensure its modernisation and development the government initiated special federal programme 'On Black Sea Navy Fleet Base at the Territory of Russian Federation in 2005—2020'. [...] The naval base is equipped with 5 berths (including floating dock) capable to receive up to 100 vessels from 1500 to 30,000 DWT. The submarine base shelters all 7 diesel-powered submarines of Russian Black Sea Navy.[citation needed]