Depth restrictions mean the largest oil tankers still cannot access the US' busiest crude cargo port, Corpus Christi, despite growing demand.

Local officials are lobbying for a long-delayed dredging project to deepen the port. But until it happens, charterers will have to rely on lightering. And the project’s completion remains uncertain.

Corpus Christi on the south Texas coast handles nearly 80% of the US' crude oil exports.