RedactedNarrative: V1 was traveling south towards the Faro Blanco Resort, and collided with a National Park Boundary Sign. According to OP1 they were traveling south from their home located in Key Largo FL and were heading towards the Faro Blanco Resort located in Marathon FL when he collided with a metal National Park Service boundary post sign. At the time of collision, the vessel was on autopilot. OP1 claims to be looking at the GPS when the collision occurred but attempted to turn the vessel to the port side in effort to avoid collision but was unsuccessful. PASSENGER 1 was sitting directly to the left of OP1. PASSENGER 2 was ejected from the vessel; no personal floatation device was being worn at this time. OP1 received a small laceration to his face but refused treatment from emergency medical services. OP1 and PASSENGER 1 were transported to Sea Base Marina by the United States Coast Guard. The vessel was towed by Tow Boat U.S; Operator: OP1 received a small laceration to his face. He refused treatment from EMS.