Olthuis Jan Koen
Oltmanns Edwin
Omae Akira
Omnithruster Inc.
Ono Hiromi
Ono Hiromu
Onofri Jean-Michel
Onstwedder John Jr.
Opacmare S.p.a.
Operata (association)
Orbeck Finn
Orchowski Richard
Oregon Marine Floats Inc.
Orenstein (o & K) & Koppel Aktiengesellschaft Werk Lubeck
Orian Technology Limited
Orszagos Gumiipari Vallalat
Ortelli Aurelio
Ortlieb Dieter
Osawa Hidemori
Osawa Masakazu