29 degrees 50.36 minutes north, 048 degrees 43.08 minutes east

That would be 1.7 nautical miles inside Iraqi waters, and not in Iranian waters!

Britain Steps Up Pressure on Iran, Freezing Business Ties

Excerpt:

The Royal Navy took the highly unusual step of making public charts, photographs and previously secret navigational coordinates purportedly proving that the sailors were 1.7 nautical miles inside Iraqi waters, and not in Iranian waters, when they were seized.

Comment: It's hard to understand the Iranian leadership! I doubt this episode alone leads to hostilities but it reminds me of the Iran hostage crisis