The young naval captain

Science fiction, War stories, Conduct of life -- Juvenile fiction, Adventure stories, Friendship -- Juvenile fiction, Bombs -- Juvenile fiction, Voyages and travels -- Juvenile fiction, Seafaring life -- Juvenile fiction, Ship captains -- Juvenile fiction, Sailors -- Juvenile fiction, Submarines (Ships) -- Juvenile fiction, Youth -- Conduct of life -- Juvenile fiction, Courtship -- Juvenile fiction, Prisoners -- Juvenile fiction, Youth and death -- Juvenile fiction, Imaginary wars and battles -- Juvenile fiction