......... and did defend themselves successfully.
http://gcaptain.com/u-s-flagged-maersk-texas-thwarts/?47173
Guess that invalidates the OP and Iran's claim.
Not at all. While the pirates had broken off the attack, they fled the area when the Iranian ship appeared. There is a difference.
It's remarkable how far some will reach in an attempt to discredit Iran at any and all levels...