Ducking under coils of wire dangling overhead, people in dusty overalls, safety goggles, and hard hats pass each other in a dark labyrinth of silver ducting, fire safety warnings, and tripping hazards ready to challenge a steel-toe boot. A constant buzz-and-bang soundtrack tells of the work they do grinding and welding, polishing, painting, and hammering into place what will be the world’s largest cruise ship come January.