Marine inspectors Lt. j.g. Shehu Bello and John Murren, both from Coast Guard Sector Baltimore, collect measurements of the vessel Blue Heron during a simplified stability inspection March 14. The Blue Heron is being certified by the Maryland Environmental Service to carry up to 27 school children for free educational field trips to Hart-Miller Island State Park. (U.S. Coast Guard by Petty Officer 3rd Class Robert Brazzell)