merchant marines

I have been searching the wrong man's family information for my grandfather was Christopher Maurice Mortensen and not a Mathias Christopher Mortensen-they were born on the same day in Bergen and I was too much in a hurry in accepting the N.E. Centers information as his. We'd always heard that our Christopher Maurice Mortensen born June 15, 1872 in Bergen (father Maurice Mortensen, mother's name unknown), he could have been a baker and cook for the Merchant Marines? .Christopher Maurice Mortensen landed in New York before leaving the marines and moving to Duluth, MN where he'd marry in 1899 to a Randine GJardrum (The Norwegian Emmigration Center was unable to find anything for her.)