What do the abrupt U turns of the Chinese linked supertankers Sea V and Hestia in the Strait of Hormuz—where the crude laden Sea V was traveling from Iraq toward the strait before turning around and stopping mid passage, while Hestia entered the Persian Gulf along Oman before rev

The reversals show that passage through Hormuz remains operationally unpredictable and commercially hazardous: even Chinese-linked tankers—often viewed as relatively insulated because China buys Iranian oil—are not treating the route as reliably safe. The reasons for Sea V’s and Hestia’s decisions are unconfirmed, so they should not by themselves be attributed to a specific Iranian order or attack.

• Costs: War-risk exposure, delays, diversions, insurance and freight premiums have raised the cost of moving crude. Longer alternative routings can more than double fuel costs—Reuters calculated about $2.87 million versus $1.26 million for one relevant diversion, before roughly $1 million in Suez fees.

• Traffic and oil exports: Tanker traffic is far below normal. Kpler-based reporting put pre-war Hormuz crude and product flows at about 18 million barrels per day, versus 4.8 million b/d in July and roughly 2 million b/d so far in August. Daily commodity-vessel crossings have at times fallen to single digits or zero after tanker attacks.

• Iran’s leverage: Tehran has demonstrated an ability to deter, selectively threaten and impose conditions on shipping, rather than simply close the waterway permanently. Its parliamentary plan includes barring U.S. and Israeli vessels, while Iran has sought transit charges of 5%–7% of cargo value.

• Disputed flow picture: Claims that the strait is effectively shut are hard to reconcile with evidence of some continuing, escorted or selectively permitted traffic. The strongest public tracking estimate still indicates a severe collapse in flows, but it cannot fully establish all movements or resolve competing U.S. and Iranian claims about who controls safe transit.

• Iran–Oman proposal: Discussions reportedly contemplated an Oman-mediated arrangement under which Iran would oversee inbound traffic. That may allow a partial reopening, but it would institutionalize Iranian discretion over a major international chokepoint; Oman has discussed a lower fee of about 3%, while Washington opposes fees.

• Outlook: Normalization looks remote, not imminent. The U-turns follow stalled diplomacy and tanker attacks, while the Trump administration’s renewed economic pressure on Tehran has hardened the contest over shipping access rather than produced a mutually accepted security regime.