Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 20C is...

20C is

  • St. Joseph Coast Guard Station / Weather Observation Station, St. Joseph, Michigan USA

20C is also in:

Acronym Definition Searched: TOT NUV USSC PLYR ITSP M&P 71970 HCW IAIS WOCA AC VMS LPW AKA BMD