Electrician's Mate class "A" school is approximately 18 weeks long, and the school is located in Great Lakes, IL. The EM rating requires a 5-year minimum enlistment contract. The Nuclear Electrician's Mate (EMN) "A" school is located in Goose Creek, SC. This training is 6 months long, and is followed by an additional 6-month "Power" school, then 6 months of "Prototype" operational reactor time continued in Goose Creek, SC or in Ballston Spa, NY. The EMN rating requires a minimum 6-year enlistment contract.