ABS (American Bureau of Shipping)
hppt://www.eagle.org/
BV (Bureau Veritas)
http://www.bureauveritas.com/
DNV (Det Norske Veritas)
http://www.dnv.com/
GL (Germanisher Lloyd)
http://www.germanlloyd.org/
KR (Korean Register of Shipping)
http://www.krs.co.kr/
LLOYD(Lloyd's Register of Shipping)
http://www.lr.org/
LLOYD(Lloyd's Register of Shipping)
http://www.classnk.or.jp/
 
IACS
http://www.iacs.org.uk/
IMO
http://www.imo.org/
ITU
http://www.itu.int/
INMARSAT
http://www.inmarsat.org/
COSPAS-SARSAT
http://www.cospas-sarsat.org/
GMDSS
http://www.navcen.uscg.mil/marcomms/gmdss/
USCG
http://www.navcen.uscg.mil/