We have so far registered 92,376 seafarers
| Name | Born | Place of birth (place of living shown if missing) | | John Magnar Opsahl | July 9, 1889 | Born in Ålesund | |
| Olav Kjartan Opsahl | April 16, 1910 | Born in Ørskog | |
| Perry Kaspar Opsahl | January 17, 1914 | Born in Ålesund | |
| Martin Elias Opsal | April 18, 1917 | Lived in Stenvåg, Ålesund | |
| Hjalmar Opstad | May 14, 1905 | Born in Ålesund | |
| Georgi Simion Orloff | May 14, 1922 | Born in Ålesund | |
| Aksel Leonard Ormbostad | July 27, 1897 | Born in Tustna | |
| Johan Julius Ormbostad | July 9, 1894 | Born in Tustna | |
| Kåre Messel Orseth | August 12, 1900 | Born in Frei, Kristiansund | |
| Olav Antonsen Orseth | November 12, 1911 | Born in Sør Aukra | |
| Sverre Orseth | April 2, 1912 | Born in Kristiansund | |
| Agnar Pedersen Orten | July 12, 1901 | Born in Aukra | |
| Trygve Sivertsen Orten | March 21, 1917 | Born in Sandøy | |
| Jakob Orø | July 30, 1899 | Born in Hustad, Bud | |
| Arne Petersen Osborg | August 25, 1894 | Born in Ørsta | |
| Lyder Oshaug | August 9, 1911 | Born in Molde | |
| Andreas Selmer Osnes | May 2, 1899 | Lived in Ålesund | |
| Asbjørn Osnes | March 14, 1921 | Born in Ålesund | |
| Ewald Osnes | March 3, 1923 | Born in Ålesund | |
| Håkon Osnes | June 26, 1910 | Born in Ulstein | |
| Kåre Palmer Ostnes | July 1, 1920 | Born in Herøy Ålesund | |
| Fredrik A. Oterhals | January 20, 1913 | Born in Aukra | |
| Jacob Oterhals | October 29, 1919 | Born in Aukra | |
| Kristian Oterhals | July 25, 1907 | Born in Aukra | |
| Peder Otrhals | May 18, 1917 | Born in Aukra | |