The St. Lawrence Seaway Pilots work in some of the harshest conditions imaginable. The pilots’ new launch, Seaway Pilot V, has already shown itself up to the task. Gladding-Hearn Shipbuilding of Somerset, Mass., modified its proven Chesapeake-class hull to withstand winter in upstate New York. The 53.5-foot vessel, built with plans from Ray Hunt Design, has thicker bottom plating to…