Regarding Merchant Marine Circular MMC-144 issued by Panama Maritime Authority which was notified by ClassNK Technical Information No. TEC-1281, the revised MMC-144 has been issued in February 2023.
The major revised parts from the TEC-1281 are as follows. This Technical Information supersedes ClassNK Technical Information No. TEC-1281.

- For use during drills, sufficient number of immersion suits not kept in airtight packaging are to be carried onboard. The assigned number of suits should be identified according to the ship's Safety Management System.
- For immersion suit and anti-exposure suit seams and closures, air pressure test is to be conducted at three years intervals by an authorized service station, and annually for suits over ten years of age by an authorized service provider according to MSC/Circ.1114.

For further details, please refer to the relevant Merchant Marine Circular posted on the following website.
URL:MMC-144-SEGUMAR-Feb2023-Rev-MR.pdf (panamashipregistry.com)

For any questions about the above, please contact:

[For the carriage requirement]
NIPPON KAIJI KYOKAI (ClassNK)
Material & Equipment Department, Administration Center Annex, Head Office
Address: 3-3 Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan
Tel.: +81-3-5226-2020
Fax: +81-3-5226-2057
E-mail: eqd@classnk.or.jp

[For the survey requirement]
Survey Department, Administration Center Annex, Head Office
Address: 3-3 Kioi-cho, Chiyoda-ku, Tokyo 102-0094, Japan
Tel.: +81-3-5226-2027 / 2028
Fax: +81-3-5226-2029
E-mail: svd@classnk.or.jp