The U.S. Coast Guard has tested Winona State University's new floating classroom.

The U.S. Coast Guard has tested Winona State University's new floating classroom.

The boat passed the test at the SkipperLiner Marine in La Crosse Thursday. The Coast Guard placed 450-pound barrels of water throughout the vessel to simulate passengers.

The unconventional classroom was inspired by Dr. Calvin Fremling, a Winona State professor, scientist and river enthusiast. Fremling died in 2010. The boat is named in his honor, reflecting his curiosity of the Mississippi River with its interactive classroom.

WXOW-TV says the Cal Fremling will be christened on June 6 at Levee Park in Winona, Minnesota.