24-foot Special Purpose Craft-Shallow Water file photo. PORTSMOUTH, Va. — The Coast Guard responded to and is investigating a collision that reportedly took place between a 94-foot tug and barge, and a pontoon boat, near the Emerald Isle High-Rise Bridge on the Intracoastal Waterway in Emerald Isle, North Carolina, Tuesday. The Coast Guard issued an urgent marine information broadcast to mariners...