Ship tracking data shows the number of vessels transiting the Strait of Hormuz increased on Tuesday, and most of them had traded with the Islamic Republic.

Reuters wrote that the move was carried out right before the start of the U.S. naval blockade.

Data from the Kepler Institute shows that of the 11 ships that passed through the strait on Tuesday, 9 transited via the Islamic Republic’s routes.

CNA also, citing the Windward Institute, wrote that 23 ships of the Islamic Republic are operating in the Strait of Hormuz with false flags, by turning off receivers or through other concealment methods, and that seven very large crude carriers carrying crude oil have been left idle on the high seas in the Indian Ocean.

Traffic through the Strait of Hormuz on Wednesday remained subdued for hours after the start of the U.S. naval blockade of Islamic Republic shipping, and only a small number of vessels dared to pass.

According to Bloomberg, based on tracking data, a Greek Suezmax tanker carrying Saudi oil reappeared near Fujairah after three days of signal interruption.