| Mahon, Walter M.; 1903 Red Book; 1903 | 1903 Red Book | 1903-00-00 | SHENANDOAH | Captain |
| Mahon, Walter M.; 1904 Red Book; 1904 | 1904 Red Book | 1904-00-00 | LANGHAM | Captain |
| Mahon, Walter M.; 1905 Red Book; 1905 | 1905 Red Book | 1905-00-00 | LANGHAM | Captain |
| Mahon, Walter M.; 1906 Red Book; 1906 | 1906 Red Book | 1906-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; 1907 Red Book; 1907 | 1907 Red Book | 1907-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; 1908 Lynn's; 1908 | 1908 Lynn's | 1908-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; 1909 Red Book; 1909 | 1909 Red Book | 1909-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; 1910 Red Book; 1910 | 1910 Red Book | 1910-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; 1911 Red Book; 1911 | 1911 Red Book | 1911-00-00 | THOMAS ADAMS | Captain |
| Mahon, Walter M.; Mansfield, 1899 | Mansfield, 1899 | 1899-00-00 | MARIDA | First Mate |