Half, or Four Percent

> The United States has one answer to the Strait of Hormuz and it is the escort mission. Whether it is working turns on a single quantity, the number of ships actually moving, and two Western sources published figures for that quantity three days apart which differ by a factor of about twelve. Neither says what it counted.

American forces struck Iranian coastal radars on 1 September. The president said afterward that the radars were ones Iran had been trying to rebuild, which places this at least second in a series. Central Command tied the strikes to Iranian attempts on commercial shipping, and Iran answered the same day against American and allied bases across the region. Two days before that, a very large crude carrier took three projectiles in the strait.

Underneath the exchange sits a question every party is answering and no reader can check. The escort mission is the entire American response to Hormuz. Warships shepherd merchant traffic out of the Gulf along the southern route, and the measure of whether that is succeeding is the volume of shipping actually moving.

Two figures for that volume reached the public within three days of each other.

American officials told Axios on 28 August that escorting had restored shipping to half of pre-war levels. An open-source tally three days later counted roughly five visible transits a day against a pre-war baseline near 130. That is about four percent.

The reconciliation everyone reaches for is dark vessels, and the arithmetic refuses it. Half of 130 is sixty-five. Climbing from five counted transits to sixty-five real ones would require something close to nine in every ten ships to be running with their transponders off, well past the undercount the counters themselves describe. Whatever separates these numbers, it is larger than a measurement caveat.

So at least one of the two is quantifying something other than daily traffic through the strait. Escorted tonnage would do it. A single route would do it. A weekly average against a peacetime peak would do it. Any of those is a defensible thing to publish. None of them has been published, and the phrase that travelled was the one without a denominator attached to it.

This is the reason the gap matters beyond bookkeeping. Nearly every serious claim about the Gulf fight is a claim about a rate. The analysts assessing whether Iran is genuinely constrained have said plainly that they will judge it by watching the rate of attacks on shipping over the coming weeks. A rate needs a denominator. Three strikes against five daily transits and three strikes against sixty-five are two different wars, and the same evidence supports either reading.

There is a version of this week where the radar strikes are working, Iranian crews are reduced to spotting tankers by eye from small boats, and traffic is climbing back toward normal. There is a version where the strait has emptied, the handful of ships still crossing are being hit at a rate no insurer will carry, and escorting has bought a corridor almost nobody uses. Both versions are consistent with everything on the public record.

The most expensive American commitment in the region runs on a scoreboard that has never been defined.