There is no mention of a Jim Janos in the article and no one mentioned him in the replies.
What is UDT?
Janos is Ventura’s real name. And even though both Naval Special Warfare and the head of the group that uncovered fake SEALs have said on the record that Ventura was a SEAL and that the UDY/SEAL distinction is meaningless, some people nonetheless insist that Jesse isn’t a SEAL “just” a UDT (underwater demolition team) member.
Ventura's real name.
What is UDT?
Underwater Demolition Team. http://en.wikipedia.org/wiki/Underwater_Demolition_Team
There is a disagreement as to whether or not UDT were equivalent to SEALs at the time Ventura was a member. Some say yes, some say no. Either way, he was never officially part of a SEAL team. The wiki post states that in 1983, after additional SEAL training, the UDTs were rolled into SEAL teams.