An improved watercraft having a viewing system, and a kit for installing a viewing system in an existing watercraft. The watercraft includes a viewing opening through a portion of the bottom of the hull and a viewing system is attached thereto. The viewing system includes a substantially transparent viewing window that is disposed within the viewing opening, an attachment that attaches the viewing window to the bottom of the hull and a seal that creates a watertight seal between the viewing window and the bottom of the hull. The kit includes the components of the viewing system and a template for marking the hull of the watercraft.