'Cornwall's commander, Commodore Nick Lambert, said he hoped the detention was a "simple mistake" stemming from the unclear border.'

http://abcnews.go.com/International/wireStory?id=2979008&page=3

I don't think you should be allowed to make a "simple mistake" when there are ongoing negotiations regarding nuclear capabilities. I agree with John Gray in Oz, under the circumstances it is highly negligent.