RedactedNarrative: OPERATOR WAS TROLLING FOR SPANISH MACKEREL OFF LOCKWOOD FOLLY INLET HE WAS TROLLING AT 4.6 MILES PER HOUR RUNNING HORIZONTAL  WITH THE COASTLINE THE WAVES WERE SUITE AND MANAGEABLE AT APPROXIMATELY 3 FOOT HIGH OPERATOR WAS LOOKING FORWARD WHEN HIS BROTHER IN-LAW YELLED OUT "LARGE WAVE BEHIND US". OPERATOR TURNED AND LOOKED TO SEE THE LARGE ROUGH WAVES UP APPROXIMATELY 10 FEET HIGH. THE WAVE THEN CAUSED THE BOAT TO CAPSIZE WITH ONLY MINOR INJURIES TO PASSENGERS.