Graphic: Tracking ship traffic through the Strait of Hormuz

Iran launched strikes on ships and demanded tolls from vessels transiting the crucial waterway in the wake of the U.S.-Israeli attack on Feb. 28. This effectively shuttered a trade route through which some 20% of the world’s oil and natural gas once passed. Tehran has also suggested it may have mined the strait. Iranian media has published a map from Iran’s Islamic Revolutionary Guard Corps Navy suggesting safe inbound and outbound routes through the strait.

Gas prices in the U.S. spiked in March as a result of the war, increasing more than 30% and topping an average of $4 per gallon.