GLOUCESTER – Join NOAA maritime archaeologists Deborah Marx and Matthew Lawrence for a tour of the Stellwagen Bank National Maritime Sanctuary’s historic shipwrecks, at Maritime Gloucester, 23 Harbor Loop, Gloucester, on Saturday, Feb. 18 from 1-3 p.m. Deborah and Matthew will present the 45-minute Science Channel’s Viewers Choice Award winning documentary, “The Wreck of the Steamship Portland.”On Nov. 26, 1898, the Steamship Portland left India Wharf in Boston for Portland, Maine, on a regularly scheduled run. She never made it to port. After much speculation, in 2002 researchers conclusively solved the mystery surrounding the Portland’s location. The movie will be followed by a presentation on Sanctuary maritime heritage projects and a tour of the Sanctuary’s exhibit at Maritime Gloucester.If You Go? This event is open to the public. Space is limited and reservations are required. Please RSVP with payment by Friday, Feb. 17. Essex Heritage and Maritime Gloucester members $5/Non-members $10. Please register online at http://www.essexheritage.org/membership or send checks to: Essex National Heritage Commission, 221 Essex Street, Suite 41 Salem, MA 01970. Call Elizabeth at 978-740-0444 for questions and details.