Regarding the rule, being informed by ClassNK Technical Information No.TEC-0903, related to obligation of installation of ballast water management system for the vessels engaged in U.S. waters, which is entitled as "Standards for Living Organisms in Ship's Ballast Water Discharged in U.S. Waters", Vol.77, Federal Register Reg.17254 effective on 21 June 2012,this is to notify that a list of foreign type-approved ballast water treatment systems of which the United States Coast Guard (USCG) has accepted as "Alternate Management Systems (AMS)", has been released.
AMS is accepted by USCG as a temporary measure to accept a ballast water management system which is approved by IMO, because the approval of USCG is supposed to take long term.
A list of AMS, continuing to be updated by USCG, is available through the following URL.

http://www.uscg.mil/hq/cg5/cg522/cg5224/bwm.asp

For any questions about the above, please contact:

NIPPON KAIJI KYOKAI (ClassNK)
Machinery Department, Administration Center Annex, Head Office
Address: 3-3 Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan
Tel.: +81-3-5226-2022 / 2023
Fax: +81-3-5226-2024
E-mail: mcd@classnk.or.jp