Jack Chase, a Britisher in United States service aboard the USS Neversink. He is the educated and civil petty officer under whom White-Jacket serves. His good work in getting privileges for the crew earns him the respect of the coarse seamen with whom he sails.
Captain Claret, a typical commander of naval vessels of the nineteenth century. He, along with his officers, feels that naval officers should drive men, not lead them. The captain is stern and usually fair but sometimes peevish and unpredictable. He never feels that common seamen deserve even a modicum of the respect ordinarily paid human beings.