The flag was one of two pieces donated to the museum last week. It was given to Shirley Honke on July 6, 2011, which was when the cremains of Capt. Jim Honke were committed to the sea during a ceremony held on the ship. She wanted the flag to stay with the ship.
"I would think an appropriate place for this flag will be in the captain's quarters," said Lisa Pallagi, museum director.
That was where Honke stayed during his time as commanding officer of the original icebreaker from 1980 to 1983. He retired after 37 years with the Coast Guard.
The other contribution was a framed enlargement of a photo of the U.S. Coast Guard Barque "Eagle." It was donated by Richard Campbell of Mackinaw City.
"The photo hung for many years in the office of a very good friend of mine," Campbell said. "I always admired it and when he passed away I was very happy to learn that he had arranged for me to receive it. I have enjoyed it but it belongs on the Mackinaw."
The Eagle was built at the Blohm & Voss Shipyard in Hamburg, Germany, in 1936, and commissioned as Horst Wessel, Eagle. It was one of three sail-training ships operated by the pre-World War II German navy.
At the end of World War II it was taken over by the United States as a war reparation. The U.S. re-commissioned it as the U.S. Coast Guard cutter Eagle and it then went to its home port in New London, Conn., where it has served ever since.