| American Bureau of Shipping | www.eagle.org | |
| Bureau Veritas | www.bureauveritas.nl/ | |
| Det Norske Veritas | www.dnv.com | |
| Germanischer Lloyd | www.gl-group.com/ | |
| International Association of Classification Societies | www.iacs.org.uk/ | |
| Lloyd's Register of Shipping | www.lr.org | |
| Registro Italiano Navale | www.rina.org/ | |
| Class Nippon Kaiji Kyokai | www.classnk.nl | |
| Teekay Corporation | www.teekay.com | |
| Chemgas Shipping | www.chemgas.nl | |
| WRS Marine | www.wrsmarine.nl | |
| Russian Maritime Register of Shipping | www.rusregister.ru/eng/ |