RedactedNarrative: Sailing vessel Island Kea II was heading southwest on the St. Johns River when the captain stated that he lost steering and that his rudder was stuck.   The captain said that he could only steer to the left.  Due to the wind and current and not having steering, the vessel operator was unable to maneuver the sailing vessel Island Kea II away from the John T. Alsop Bridge (Main St. Bridge).  The sailing vessel Island Kea II struck the Main St. Bridge with the mast on the North side bridge support and on the North side bridge span.