RedactedNarrative: On June 14, 2014 V1 carrying 5 passengers, a dog & fishing gear left the campsite at Bulger's Hollow & headed north & upriver on the Mississippi River. They motored up the Iowa side  of the Mississippi River into the Elk River Slough & continued north. They had plans to fish near where the Elk River empties into the Mississippi River & when they got just north of  the mouth of the river, Operator turned the boat to the mouth of the river.   As the operator turned the boat, a wave came over the bow of the boat.  Passenger moved toward the bow of the boat to begin bailing water when a 2nd & 3rd wave came over the side of the boat.  The boat began to sink & settled on the bottom in about 8-9 ft of water. Passenger was gripping the motor & seat with his feet while he was hanging onto his 2 children.  His Father, was hanging onto his neck & Passenger was holding his grandmother’s lifejacket.   The dog was also trying to climb up on the group. Operator, disappeared & sank, he  was not wearing a life jacket.  Passenger lost grip of the motor he was standing on & began drifting with the current, with his two children. Grandmother slipped out of his hands. Passenger & his 2 children made it to shore & then waved down  a  boat for help. As he was on shore, he witnessed his grandmother float by.  Passenger described his grandmother as having "Alzheimer's & usually in a wheelchair, yet she was not in a wheelchair while in the boat.  Grandmother & the 2 children were wearing life jackets, yet it is believed that due to the Alzheimer's, the grandmother was unable to hold her head up while wearing the type 3 jacket.