| Decatur, Robert B.; ISMA Directory; 1923 | ISMA Directory | 1923-00-00 | | Captain |
| Decatur, Robert B.; ISMA Directory; 1925 | ISMA Directory | 1925-00-00 | MARITANA | Captain |
| Decatur, Robert B.; ISMA Directory; 1926 | ISMA Directory | 1926-00-00 | NEILSON, JAMES B. | Captain |
| Decatur, Robert B.; ISMA Directory; 1927 | ISMA Directory | 1927-00-00 | ZENITH CITY | Captain |
| Decatur, Robert B.; ISMA Directory; 1928 | ISMA Directory | 1928-00-00 | ZENITH CITY | Captain |
| Decatur, Robert B.; ISMA Directory; 1929 | ISMA Directory | 1929-00-00 | ZENITH CITY | Captain |
| Decatur, Robert B.; ISMA Directory; 1931 | ISMA Directory | 1931-00-00 | SHIRAS, MCGILVRAY | Captain |