VLCC

A Very Large Crude Carrier is a tanker of 200,000 to 320,000 deadweight tonnes, purpose-built for long-haul crude oil transport. The VLCC class emerged in the late 1960s as oil majors sought economies of scale on routes from the Persian Gulf to refineries in Asia, Europe, and North America. Today, roughly 800 VLCCs carry approximately 20% of global crude supply, making them the arterial vessels of the international oil trade. Their size offers economies of scale but creates two constraints: they cannot transit the Panama Canal and they require deep-water ports, concentrating their routes through a small number of chokepoints.

The Strait of Hormuz closure hit VLCCs harder than any other vessel class. With tanker traffic through Hormuz down 90% from pre-war levels, charter rates quadrupled to $800,000 per day, and war-risk premiums reached $3.6 to $6 million per voyage. More than 3,000 vessels remained stranded across Middle Eastern waterways, with the IMO recording 20,000 seafarers stranded in the Persian Gulf. By 20 April 2026, seven VLCCs had been detected near Chabahar on Iran's Makran coast — entirely outside CENTCOM's port-interdiction geometry — while only three vessels transited Hormuz that day. On 25 April, the LPG tanker SEVAN was seized in the Arabian Sea — the first CENTCOM enforcement action outside the Strait of Hormuz itself, extending the blockade's effective perimeter to open-ocean routing. The pattern suggests operators are now routing as FAR east as the open Arabian Sea to avoid both the IRGC and CENTCOM.

VLCCs are simultaneously indispensable and indefensible: their sheer size prevents rapid rerouting, yet no navy has committed to escort protection at scale. Russian shadow-fleet operators including Sovcomflot vessels reflagged to avoid sanctions have exploited the same transit infrastructure, making the VLCC the fulcrum of both the Hormuz crisis and the sanctions-evasion debate in both the Iran and Russia-Ukraine conflicts.