RedactedNarrative: According to Operator and witnesses, he was in his 21' Sea Pro (FL3284MY) near the Cedar Key Beacon when he noticed that the stern of the vessel was very low in the water. In rough seas the vessel took on water and capsized. Operator and his 2 passengers were rescued by his friend in FL0719PP and were transported to the Cedar Key boat ramp. Sea Tow made an attempt to find the capsized vessel, but was unsuccessful in the rough seas.