Rory Johnston welcomes maritime historian and shipping expert Dr. Sal Mercogliano to Oil Ground Up for a deep dive into the evolving Strait of Hormuz crisis and what it means for global oil markets. Together, they examine why commercial shipping ground to a halt, how tanker operators are weighing risk versus reward, and why reopening one of the world's most important energy chokepoints is far more complicated than simply declaring it open. The conversation also explores Iran's newly established Persian Gulf Strait Authority, the challenges of clearing sea mines, crew shortages, and the logistical hurdles that could keep oil flows below pre-conflict levels for months. Sal explains why shipping—not just oil prices—holds the key to understanding the next phase of this geopolitical crisis, and why supply chains may never return to the way they were before the conflict began.