The first annual Marine Show on St. John is scheduled for Saturday, May 6th at the Marketplace from 9am to 2pm. The free show will include boats, educational presentations and demonstrations. "Boats and engines of various shapes and sizes will be on display and for sale, sponsored by Bradford Aircraft & Marine Accessories, Gary's Marine Service, Maritime Yacht Sales, and Offshore Marine, a spokeswoman for the show said. Bob Wilkensen of B&C Boat Building will also demonstrate techniques he uses to construct water craft.