A natural gas tanker docked at Venture Global’s Calcasieu Pass loomed large as Phillip “Rooster” Dyson Jr.’s small shrimp boat rolled by in the Calcasieu Ship Channel. The narrow waterway in western Louisiana isn’t big enough for the both of them, Dyson said. His boat gets diverted around three times a week by the big ships — disruptions that can last several hours and cost him as much as $5,000 a night in lost revenue.