John, EI7GL on Twitter: "Heard the German icebreaker 'Polarstern' on 28 MHz overnight in the North Sea after leaving Germany. DP0POL is one of the more unusual WSPR signals heard on the
Eisbrecher Biography, Songs, & Albums | AllMusic
Eisbrecher *Ice Breaker* | Ice breakers, River monsters, Beautiful creatures
The polar voyage being threatened by thin ice - BBC Future
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