| McCowan, Alexander; ISMA Directory; 1899 | ISMA Directory | 1899-00-00 | | Captain |
| McCowan, Alexander; ISMA Directory; 1900 | ISMA Directory | 1900-00-00 | | Captain |
| McCowan, Alexander; ISMA Directory; 1901 | ISMA Directory | 1901-00-00 | | Captain |
| McCowan, Alexander; ISMA Directory; 1902 | ISMA Directory | 1902-00-00 | | Captain |
| McCowan, Alexander; ISMA Directory; 1906 | ISMA Directory | 1906-00-00 | NEW YORK | Captain |
| McCowan, Alexander; ISMA Directory; 1907 | ISMA Directory | 1907-00-00 | NEW YORK | Captain |
| McCowan, Alexander; ISMA Directory; 1908 | ISMA Directory | 1908-00-00 | NEW YORK | Captain |
| McCowan, Alexander; ISMA Directory; 1910 | ISMA Directory | 1910-00-00 | LAKELAND | Captain |
| McCowan, Alexander; ISMA Directory; 1911 | ISMA Directory | 1911-00-00 | LAKELAND | Captain |
| McCowan, Alexander; ISMA Directory; 1912 | ISMA Directory | 1912-00-00 | LAKELAND | Captain |
| McCowan, Alexander; ISMA Directory; 1913 | ISMA Directory | 1913-00-00 | LAKELAND | Captain |
| McCowan, Alexander; ISMA Directory; 1918 | ISMA Directory | 1918-00-00 | LAKELAND | Captain |