If you are violating the Jones Act, the Offshore Marine Service Association (OMSA) is ready to put you on blast.

Promising that "we'll be watching", the US offshore trade group is launching the 315-dwt Jones Act Enforcer (built 2007) — a ship it intends to use to document and publicise what it considers violations of the cenutry-old cabotage law.

"The Jones Act is very simple, if a foreign vessel picks up cargo at one point in the United States, and takes it to another point, it has broken the law," OMSA president and...