Which is Worse?

Supposedly, on Sunday the Iranians initially gave GPS coordinates that said the UK sailors were clearly in Iraqi waters. That is until the UK representatives pointed out that the Iranians were just admitting they lied. Magically, the Iranians then issued a new set of coordinates which said the sailors were captured half a kilometer inside Iranian waters.

However, if you believe the Royal Navy, the GPS equipment, the Iraqi foreign minister, and the captain of the Indian-flagged merchant vessel they had inspected, the UK sailors were 1.7 nautical miles or roughly three kilometers inside Iraqi waters when they were abducted.

In reviewing these conflicting stories, I had a nagging thought and now I am putting this question out to you:

Which is worse - the UK sailors straying off course by half a kilometer or the UK Navy allowing Iranian ships to attack three kilometers into Iraqi waters?