My sister is a research librarian/historian/museum curator and said:
A gazillion people may already have suggested this, but . . .
Ancestry.com includes crew lists, where applicable. Enter the person’s name and any useful details, and when the list of available documents comes up, his/her appearance on crew lists will be included. (Of course, there may hundreds of John Smiths, so here’s hoping for a more distinctive name!)
Ancestry is usually available for use without charge in public libraries — but take a notebook because the information won’t be saved.