RedactedNarrative: Injured person 1 indicated that vessel 1 was underway at the time of the accident. Injured person 1 was seated in back along with other passengers. The vessel's bow anchor malfunctioned and dropped into the water while the vessel 1 was in cruising mode. The anchor must have caught the bottom of the lake floor while still moving, and then gave way. The anchor came out of the water from behind, in a forward direction striking injured in the back of the head. The anchor also struck injured person 2 in the lower left part of her arm. As the anchor was still in motion it came towards the rear of the vessel and wrapped  itself around the port side prop causing damage to the prop. No treatment requested.