RedactedNarrative: Vessel 1 was attempting to dock his vessel in slip #75 traveling westbound on the Calaban Canal at idle speed. Owner of vessel 2 observed vessel 1 attempting to dock and boarded his vessel which was on a lift in an effort to fend off vessel 1 from striking his vessel. Operator of vessel 1 attempted to turn to starboard causing the dive ladder extending out from the port side transom of his vessel to make contact with the port motor of vessel 2. The lower unit of vessel 2 was twisted due to contact. Owner of vessel 2 will have the vessel brought to a marina to determine any additional damage that could not be seen as the transom of vessel could not be inspected while on the boat lift. Both individuals issued case cards and exchanged owner information. No injuries No additional at this time.