Something strange is happening in the Gulf of Oman, and the inconsistency is almost laughable if the stakes weren’t so high.
Three Iranian tankers loaded with crude oil, each one owned by the National Iranian Tanker Company (a US-sanctioned entity), sailed past what was supposed to be a US blockade line this week. Two of them were broadcasting their positions openly. The third did something smarter, switching its tracker on only after crossing the line. That’s not the behavior of ships worried about detection. That’s the behavior of people testing whether anyone is actually going to stop them.
According to BBC reporting, the vessels Diona, Hero II, and Sonia I are carrying a combined 3.8 million barrels of crude. They left Iran’s Chabahar port on Tuesday and made their move in the early hours of Wednesday. This is the first time any of these particular tankers have shown up on tracking platforms since March. If they reach their destination, it would mark Iran’s first oil exports in two months.
Here’s where it gets really interesting. President Trump announced on Sunday that the blockade would be “immediately removed.” The US Navy, though, said something different. The blockade stays until the nuclear deal is actually signed, which is supposed to happen in Switzerland on Friday. So right now, there’s a kind of geopolitical limbo where Iranian tankers are acting like the blockade is over while American forces are technically still enforcing it. The gap between rhetoric and reality is being exploited in real-time.
Michelle Wiese Bockman, a senior analyst at Windward Maritime Intelligence, put it nicely for BBC Verify: this is a sign that Iran is confident the blockade is over, even if the US says otherwise. That’s a pretty bold gamble, but it makes sense. The US has been clear that enforcement could stretch far beyond the Gulf, into the Indian Ocean and beyond. But actually intercepting ships now, after the announcement? That would be a very public contradiction of the president’s own words.
The three tankers aren’t alone either. Since the deal was announced, Iranian-linked vessels have become noticeably more active globally, according to the monitoring group United Against Nuclear Iran. Two other NITC tankers, Dan and Sinopa, suddenly started broadcasting their positions in the Strait of Malacca on Tuesday after disappearing from public tracking platforms in early April. They’re sailing toward Iran. Another unladen tanker called Stream stopped broadcasting just before the blockade line and seems to be heading back toward Iranian waters.
This tells us something important about how this works. Sanctions regimes depend on opacity. They work when the market can’t be sure where the oil is going. Once that uncertainty breaks, once tankers start moving openly and the tracking data is there for everyone to see, the pressure starts to evaporate. Iran’s crude exports had fallen to just 260,000 barrels per day in May, the lowest in six years. That’s down from 1.67 million barrels per day in 2025. The economic squeeze was real. Now they’re signaling that the squeeze is letting up.
It’s worth remembering that we don’t actually know what’s in the deal yet. The signing hasn’t happened. Trump said one thing, the Navy said another, and somewhere in between, Iran is pushing ships through a line that may or may not mean anything anymore. Whether this turns into a genuine reopening of Iran’s oil markets or a flashpoint that leads to confrontations at sea probably depends on what happens in Switzerland on Friday and whether anyone in Washington is willing to contradict the president publicly.
What we do know is that Iran is wasting no time, and they are watching closely to see if anyone actually stops them. So far, nobody has.
