Systems, devices, and methods for providing a swinging system and platform assembly that deploys a swim platform from the front of a pontoon boat which is mounted underneath the deck between the pontoons in a raised position adjacent to the underside of the pontoon deck. The platform assembly, when deployed, provides a safe method for users of pontoon boat vessels to access the front deck area from land or from a body of water. The platform deploys from two pivoting frames affixed to the bottom of the deck, which is powered by an actuator with the push of a button on the control panel. For deployment, the platform is both lowered and extended out from the pontoon boat. A powered actuator positions the platform in the deployed position for use and then retracts the platform for storage.