"I guess the rig was trying to escape so they fired on it. Hey, does anyone know the top speed of an oil rig?"
This one was being moved. They don't move very fast.
Some info on Kish Island
http://www.kishtpc.com/Kish%20Over%20Photos1.htm
http://www.floweroftheeast.de/main.php?bw=low
http://www.iranmania.com/News/ArticleView/Default.asp?NewsCode=45076&NewsKind=Current%20Affairs
"Fortuna Oilrig sneaks out of Iran waters at night
Wednesday, August 16, 2006 - ©2005 IranMania.com
LONDON, August 16 (IranMania) - Fortuna Oilrig was taken out of Iranian waters by illegal means.
According to MNA, the owner, Romanian GSP, has done so in collaboration with an Iranian marine company and a foreign firm in violation of international and security regulations, managing director of PetroIran Development Company Seyyed Mostafa Khoyi announced.
The vessel in charge of carting off the drilling rig to Fujaireh port at UAE, initially received the permit to leave Bandar Abbas for the port by the assistance of Boyeh Sabz of Iran, appearing as the Iranian representative, and the backing of a firm from UAE. ..."