| Steffenson, Ole; ISMA Directory; 1911 | ISMA Directory | 1911-00-00 | HELVETIA | Captain |
| Steffenson, Ole; ISMA Directory; 1912 | ISMA Directory | 1912-00-00 | HELVETIA | Captain |
| Steffenson, Ole; ISMA Directory; 1913 | ISMA Directory | 1913-00-00 | HELVETIA | Captain |
| Steffenson, Ole; ISMA Directory; 1914 | ISMA Directory | 1914-00-00 | HELVETIA | Captain |
| Steffenson, Ole; ISMA Directory; 1916 | ISMA Directory | 1916-00-00 | TILDEN, S.J. | Captain |
| Steffenson, Ole; ISMA Directory; 1917 | ISMA Directory | 1917-00-00 | INTERLAKEN | Captain |
| Steffenson, Ole; ISMA Directory; 1918 | ISMA Directory | 1918-00-00 | INTERLAKEN | Captain |
| Steffenson, Ole; ISMA Directory; 1919 | ISMA Directory | 1919-00-00 | INTERLAKEN | Captain |
| Steffenson, Ole; ISMA Directory; 1924 | ISMA Directory | 1924-00-00 | REDFERN, C.E. | Captain |