This Iranian-born writer says its definitely fake;
"Any Iranian can immediately identify Persian-accented English, particularly if the speaker has had little contact with the West, as is the case with Revolutionary Guardsmen and sailors. Iranians, you see, have difficulty with two consonants such as "p" and "l" next to each other; even Iranians who have lived in America for years will often pronounce "please" as "peh-leeze", or in this case, "explode" as "exp-eh-lode". On the tape, "explode" is pronounced perfectly, albeit as if the speaker was a villain addressing a superhero. Further, it is unimaginable, given what is known about the Revolutionary Guards (and I have met many), that one of its corps would speak in a such a manner, even if the accent were correctly Persian..."
http://www.democraticunderground.com/discuss/duboard.php?az=show_topic&forum=389&topic_id=2643436Now the Navy Times has printed interviews with Gulf sailors who concur, saying that the audio could be from a "prankster", a "Filipino Monkey";
"...the Navy was still trying to determine the source of the transmission but believed it was related to the Iranian actions...
...However, the Navy Times, a weekly newspaper published by the Gannett company, quoted several veteran sailors as speculating the transmission could have come from a radio heckler, widely known among mariners by the ethnically insulting term "the Filipino Monkey."
The newspaper, which serves the Navy community, said U.S. sailors in the Persian Gulf have heard the prankster - possibly more than one person - transmitting "insults and jabbering vile epithets" on unencrypted frequencies.
"Navy women - a helicopter pilot hailing a tanker, for example - who are overheard on the radio are said to suffer particularly degrading treatment," the newspaper said Sunday. "Several Navy ship drivers interviewed by Navy Times are raising the possibility that the Monkey, or an imitator, was indeed featured in that video."
Filipino Monkey is a name used by mariners around the globe for someone who uses his radio for unnecessary or inappropriate transmissions..."
http://news.aol.com/story/_a/prank-may-have-sparked-gulf-showdown/20080114182609990001?ncid=NWS00010000000001Bushco is testing the waters in the Strait of Hormuz.
Fool me twice...