The Zero Dock is located in Bigg City Port, and is the building and home owned by the Z-Stacks. It is used to inform the tugboats the day's events and duties and store them overnight. Captain Zero uses a yellow and black striped megaphone to communicate with all five members of his crew. The dock is adjacent to the Star Dock, but not nearly as glamorous as its neighbours', as it is simply a dark, run-down wooden shack even though this look suits that similarly used as the standard livery used by the Z-Stacks.
Both Zero and Star docks are built beneath the upward span of the road suspension bridge over Bigg City.