| Mahon, M. H.; 1909 Red Book; 1909 | 1909 Red Book | 1909-00-00 | PENOBSCOT | Captain |
| Mahon, M. H.; 1916 Green's | 1916 Green's | | ROUMANIA | Captain |
| Mahon, M. H.; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | ROUMANIA | Captain |
| Mahon, M. H.; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | WILLIAM A. REISS | Captain |
| Mahon, M. H.; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | WILLIAM A. REISS | Captain |
| Mahon, M. H.; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | WILLIAM A. REISS | Captain |
| Mahon, M. H.; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | A. M. BYERS | Captain |
| Mahon, M. H.; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | A. M. BYERS | Captain |
| Mahon, M. H.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | BRITANNIA | Captain |
| Mahon, M. H.; Marine Review Nov 1917 | Marine Review Nov 1917 | 1917-00-00 | WILLIAM A. REISS | Captain |