A buoy's type is indicated by the ________________________ printed with it.

A buoy's type is indicated by its shape, which is an essential part of the International Association of Lighthouse Authorities (IALA) system. The shape helps mariners quickly identify the buoy's purpose, such as if it's marking a channel or a hazard. For example, conical buoys generally indicate a specific navigational function, often marking the channel's edge, while cylindrical buoys typically serve as lateral markers.

While the color, number, and light pattern of a buoy also provide important identifying information and help with navigation, it is the shape that distinctly denotes the type of buoy and its specific role in navigation. Shapes are standardized and recognized internationally, promoting safety and facilitating consistent interpretation by boaters.