RedactedNarrative: Accident occurred as an unknown operator 1 had operated vessel 1 and stopped. As vessel 1 was drifting with 2 passengers onboard while they were fishing from vessel 1. As the passengers were fishing passenger 1 experienced a medical condition (seizure) which caused passenger 1 who was fishing from the stern pedestal seat to fall overboard into the water. Passenger 2 exited vessel 1 to try to assist passenger 1 and was unable to pull them back onto vessel 1. Passenger 1 was later recovered via a dive team. Vessel 1 did not sustain any damage.