The first main character is fifteen year old Harvey Cheyne who is traveling to Europe from the U.S. He begins his trip with a chip on his shoulder, but the work involved in the trip helps him to become self reliant.
Dan Troop is the captain's son. He has doubts about Harvey
Disko Troop is the Captain of "We're Here", a schooner. He is a good and respectful captain.
Mr. Cheyne is Harvey's proud father.
Other crew members include Long Jack, Manuel, Salters, Pennsylvania, and The Cook.