St. Tammany's connections with the oil field workboat industry spans several decades. Several shipyards in Madisonville, Lacombe and Slidell have built a large variety of vessels over the past 100 years: cargo ships, workboats, crewboats, tugboats and barges. Once launched these would fan out around the globe.
Harry L. Peace ran Peace Publications out of offices just south of Covington for many years, and he published Workboat Magazine and a few other titles that served the worldwide boat industry. His efforts included an annual international workboat exposition in New Orleans.
I interviewed Peace back in the 1980's, and his operation was quite extensive even then. It has only grown more so over the years as it strove to keep up with the rapidly diversifying and now computer-intensive work boat industry.
Then there's the Maritime Pilots Institute in downtown Covington that teaches boat captains and waterway pilots from around the world how to navigate, maneuver and dock all kinds of workboats, including those of considerable size.
See also:
https://maritimepilotsinstitute.org/