I looked it up (as I tend to) and for paddyannes delectation here is wha I wrote on another thread
Passage through the Gulf of Hormuz is governed by the UN Convention on the Law of the Sea. Iran is a signatory to that Convention, but has regularly ignored its responsibilities under that treaty when in it chose to.
To reduce the risk of collision in the Strait, ships moving through it follow an agreed route, which is divided into lanes, each 2 miles wide, with a 2 mile separation lane between them. Inbound ships use one lane, outbound ships the other.
The Stena Imperio, was in the correct channel following the approved route.
Please do not try to curb paddyann There is nothing like a good old-fashioned rant from a good old-fashioned zenophobe to get a good giggle going and the day to a good start