Let me rephrase my question. Where could they stop and refuel without being seen? An Iranian sub in the Indian Ocean or Atlantic Ocean might be cause for comment.
You're right. The worker bee ONI people would be quite interested in what the Iranians once they were spotted; however, the world's a big place.
If found the question devolves into, would the higher pay grades give any special review to a darker blob along side a dark blob on a satellite photo of the middle of the ocean when the party line is the biggest threat to the world is conservative talk radio?