The other thing about 2004 was that it was actually quite close to the Shatt al-Arab mouth, going up the river, where you can say, 'Well, it's quite close, where is the median line?', although they were clearly in Iraqi waters. This has taken place further out.
How can you tell which waters you are in?
It is highly complex. A commission is meant to meet to lay down the median line down the Shatt al-Arab and agree where the various lines are. So we have the line we believe is the correct one. We then make allowance the other side of it and make sure our craft operate well clear of that.
What kind of equipment would the navy have to guide them?
They have GPS and they have a system which allows communications. It means they know where the mother ship is and the mother ship knows where they are. GPS means they know their position exactly.
It's not like the old days when you went away in a boat and didn't really have a clue where you were. But all they had were small arms, they don't have heavy weapons. So of course to actually start fighting patrol boats would not be a clever thing.
What are the rules of engagement in this type of situation?
The rules are very much de-escalatory, because we don't want wars starting. The reason we are there is to be a force for good, to make the whole area safe, to look after the Iraqi big oil platforms and also to stop smuggling and terrorism there.
So we try to downplay things. Rather then roaring into action and sinking everything in sight we try to step back and that, of course, is why our chaps were effectively able to be captured and taken away.
If we find this is going to be a standard practice we need to think very carefully about what rules of engagement we want and how we operate. One can't allow as a standard practice nations to capture a nation's servicemen. That is clearly wrong.