RedactedNarrative: Operator states that he was attempting to maneuver to another berth and lost power in Reynolds Channel.  Unable to regain power operator raised his main sail in an attempt to gain steerage of the vessel.  At this time there was sustained winds of 15 knots and current setting to the west.  The operator was unable to control his vessel under sail and allied with the Loop Parkway One.  This caused the navigational lights on the bridge facing east to stop working and the main sail on the vessel to be broken off.  Police were able to report to scene and control the situation towing the vessel to a nearby marina.