A Dock is an infrastructure building in Tropico 5. It exports and imports resources. Each Dock provides one Trade Ship. Because Docks are so vital to the economy, every island starts with one and can never have any less than that. Each dock will allow one trade ship. More docks means more trade ships and greater exports. It is extremely difficult to survive with only one Dock. The default trade ship frequency is every six months but this can be shorted to every 5 by increasing the Dock's budget.