Places to tie up are locations where boats can be secured. DOCKS, marinas, and piers are all places to tie up. DOCKS are typically located in a harbor and are used for loading and unloading cargo or passengers. Marinas are usually found near a body of water and provide services such as fuel, repairs, and storage for boats. Piers are structures that extend out from the shoreline and are used for fishing, sightseeing, and other recreational activities.