I found the Declaration of Intent for Karl "Will" Heinriech Korn and learned he was aboard the ship Vaterland, which was siezed by the U.S. at the start of WWI at Hoboken. The ship was ordered to stay there to avoid falling into enemy hands. She stayed there until 1917.

Does anyone know what happened to the crew members?
Did they stay on the ship for three years?
Were they allowed to leave and find jobs if they were considered "aliens?"

Also have Will's birthdate: 20 October 1885
He is married to Therese who resides in Germany.

Thanks!