| Bentgen, Hillard F.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | MACKINAC CITY | Captain |
| Bentgen, Hillard F.; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | ELVA | Captain |
| Bentgen, Hillard F.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | ELVA | Captain |
| Bentgen, Hillard F.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | ELVA | Captain |
| Bentgen, Hillard F.; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | ELVA | Captain |
| Bentgen, Hillard F.; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | MACKINAC ISLANDER | Captain |
| Bentgen, Hillard F.; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | MACKINAC ISLANDER | Captain |
| Bentgen, Hillard F.; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | MACKINAC ISLANDER | Captain |
| Bentgen, Hillard F.; 1942 Red Book; 1942 | 1942 Red Book | 1942-00-00 | MACKINAC ISLANDER | Captain |
| Bentgen, Hillard F.; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | MACKINAC ISLANDER | Captain |
| Bentgen, Hillard F.; 1948 Red Book; 1948 | 1948 Red Book | 1948-00-00 | | Superintendent |
| Bentgen, Hillard F.; Great Lakes News 4/44; 1944 | Great Lakes News 4/44 | 1944-00-00 | SAINTE MARIE | Captain |