oooh...thinking about this.
Say those ships ARE on a suicide mission. They blow the nukes somewhere along a part of the canal that doesn’t have a big population. It likely would not block the canal, although you’d have a much deeper part of the canal than what it is currently due to the crater.
The water itself wouldn’t be radioactive after a short while...but all the land surrounding it WOULD BE. For quite a while, any ship going through there would be getting large doses of radiation. No one would WANT to go through THAT. They could shut down the canal for years without really damaging it.
The likelihood of this happening? Probably slim. I don’t think Iran would want to piss off Egypt by doing something so egregiously stupid to them.
Well I think the Iranians are insane enough to pull something like that. However I would bet the would attack oil. One way to send the world into the dark ages is to cause oil fields to be radioactive. Just the thought of Iranian ships cruising around Saudi should make people nervous.
That is what I worry about in the U.S. A dirty bomb at tank farms or major refineries would pretty much shut us down.
I think they would rather block the Gate of Tears with such a thing.