RedactedNarrative: Operator of vessel reports he was operating vessel in Great South Bay at approx. 30 mph. Operator states he hit unexpected shallow water and grounded his vessel, causing injuries to his wife and daughter from falling within vessel. SCPD Marine Bureau towed vessel out of shallow water and directed operator to follow Atlantique Marina. Subjects were treated for their injuries by Fair Harbor Rescue and Ocean Beach rescue, and then transported by SCPD to Islip exchange rescue to continue transport to Good Samaritan hospital.