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RT @simon_sat@twitter.com

Some really cool views of the Gulf of Finland taken by the @CopernicusEU@twitter.com satellite: The water in the gulf is mostly frozen, so appears dark in these pictures.

But what are those bright lines? They're open water, cleared of ice by Icebreakers to allow ships to pass!

πŸ¦πŸ”—: twitter.com/simon_sat/status/1

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