I knew I read it somewhere...
it is on page one of the Plebe Parents Handbook 2008
http://www.usmma.edu/parents/2008 Plebe Parent Tips.pdf
New requirement for Class of 2012: You must obtain a Transportation Worker Identification Credential (TWIC) and it will cost you $132.50. I can‟t emphasize enough how important it is to not delay applying for this credential.
To obtain a TWIC your son/daughter must go to a Transportation Security Administration enrollment center twice, once for enrollment, the second time to pick up the TWIC. Enrollment and pick-up must be done at the same enrollment center.
Once you enroll, there will be a six to eight week wait to pick up the TWIC, so enroll early. There is NO expedited process for an additional fee like passports.
Here‟s the website to pre-enroll and schedule an appointment and I highly recommend this procedure: https://twicprogram.tsa.dhs.gov/TWICWebApp/Welcome.do
When pre-enrolling, indicate the purpose for the card is for employment as a Merchant Mariner and that the U.S. Merchant Marine Academy is the employer.
Consult the Logging In Reporting Instructions: http://www.usmma.edu/admissions/PDFs/LoggingIn2012.pdf
for procedures if you do not have sufficient time to obtain a TWIC before reporting for indoc.