This document discusses guerdon service, also known as trolley service, where dishes are prepared and served directly to guests on a trolley. It describes different types of trolleys used, including hors d'oeuvre, salad, food preparation, cheese, and liqueur trolleys. Equipment commonly used on trolleys is also outlined, such as flare lamps, gas stoves, chafing dishes, and carving boards. The document stresses the importance of regularly maintaining trolley equipment for efficient performance.