| Nelson, Harold C.; 1949 Blue Book; 1949 | 1949 Blue Book | 1949-00-00 | SOUTH AMERICAN | First Mate |
| Nelson, Harold C.; 1954 Red Book; 1954 | 1954 Red Book | 1954-00-00 | NORTH AMERICAN | Captain |
| Nelson, Harold C.; 1955 Red Book; 1955 | 1955 Red Book | 1955-00-00 | NORTH AMERICAN | Captain |
| Nelson, Harold C.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | NORTH AMERICAN | Captain |
| Nelson, Harold C.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1958 Red Book; 1958 | 1958 Red Book | 1958-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | SOUTH AMERICAN | Captain |
| Nelson, Harold C.; 8/48 Great Lakes Review; 1948 | 8/48 Great Lakes Review | 1948-00-00 | SOUTH AMERICAN | First Mate |
| Nelson, Harold C.; Great Lakes News 5/42; 1942 | Great Lakes News 5/42 | 1942-00-00 | ALABAMA | First Mate |
| Nelson, Harold C.; Great Lakes News 7/43; 1943 | Great Lakes News 7/43 | 1943-00-00 | SOUTH AMERICAN | Second Mate |
| Nelson, Harold C.; Great Lakes News 8/40; 1940 | Great Lakes News 8/40 | 1940-00-00 | NORTH AMERICAN | First Mate |
| Nelson, Harold C.; Great Lakes Review. 1944 | Great Lakes Review. 1944 | 1944-00-00 | NORTH AMERICAN | First Mate |