Landing on the water is a term used to describe the process of a boat or aircraft coming to rest on the surface of a body of water. This can be done intentionally, such as when a boat docks at a PIER, or unintentionally, such as when an aircraft has to make an emergency landing on a lake. The term 'PIER' is a four-letter word that is often used to refer to a structure built out over the water, which provides a platform for boats to dock and disembark passengers.