The transom is the vertical cross-section portion of the boats stern that strengthens the stern and offers a location to mount a motor. It is the flat, vertical structure at the stern, or back of the boat. Most modern boats are designed with the intent that a motor will be attached to the transom, and it is traditional for the name of a vessel to be painted on the transom above the boats waterline. The transom can be used to support a rudder, outboard motor, or as a swimming and access platform). It is an important part of the boat as it reinforces and supports the back of the boat.