RedactedNarrative: On 08/22/2015, Five people and three children launched their boat from High Point Marina for water skiing, wake boarding, and swimming. At the end of their boating activities, operator was operating the boat back to the marina, at 20 miles per hour, when she struck a submerged object, with the boats lower unit, in the area of Freemans Point, which is located on Lake Anna. She did not see the object that she struck nor any debris or mud evidence from the lower unit strike. She and group did not notice any damage to the boat until the boat was trailed back at the marina. when the boat was removed from the water is when they noticed the skeg broken off of the lower unit and that the gear housing of the lower unit was cracked open, allowing fluid to leak out.