What information if any do you already have about the time period it was used by the Coast Guard and the use to which is was put?
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Dear Ms. Owens,
Thank you for posting your request on History Hub!
The records you seek may be in the Records of the U.S. Coast Guard (Record Group 26). The records pertaining to Michigan would be in the custody of the National Archives at Chicago (RM-CH) [email - firstname.lastname@example.org] and the headquarters records would be in the custody of the National Archives at Washington, DC (RDT1) [email - email@example.com].
We hope this information is helpful.