| Grosvenor, George Michael; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | SMILING THRU | Captain |
| Grosvenor, George Michael; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | MANITON ISLE | Captain |
| Grosvenor, George Michael; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1962 Red Book; 1962 | 1962 Red Book | 1962-00-00 | SMILING THRU | Captain |
| Grosvenor, George Michael; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | SMILING THRU | Chief Engineer |
| Grosvenor, George Michael; 1963 Red Book; 1963 | 1963 Red Book | 1963-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1964 Red Book; 1964 | 1964 Red Book | 1964-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1964 Red Book; 1964 | 1964 Red Book | 1964-00-00 | SMILING THRU | Captain |
| Grosvenor, George Michael; 1965 Red Book; 1965 | 1965 Red Book | 1965-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1966 Red Book; 1965 | 1966 Red Book | 1965-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1967 Red Book; 1967 | 1967 Red Book | 1967-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1968 Red Book; 1968 | 1968 Red Book | 1968-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1968 Red Book; 1968 | 1968 Red Book | 1968-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1969 Red Book; 1969 | 1969 Red Book | 1969-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1969 Red Book; 1969 | 1969 Red Book | 1969-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1970 Red Book; 1970 | 1970 Red Book | 1970-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1970 Red Book; 1970 | 1970 Red Book | 1970-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1971 Red Book; 1971 | 1971 Red Book | 1971-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1971 Red Book; 1971 | 1971 Red Book | 1971-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1972 Red Book; 1972 | 1972 Red Book | 1972-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1972 Red Book; 1972 | 1972 Red Book | 1972-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1973 Red Book; 1973 | 1973 Red Book | 1973-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1973 Red Book; 1973 | 1973 Red Book | 1973-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1975 Red Book; 1975 | 1975 Red Book | 1975-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1975 Red Book; 1975 | 1975 Red Book | 1975-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1976 Red Book; 1976 | 1976 Red Book | 1976-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1976 Red Book; 1976 | 1976 Red Book | 1976-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1977 Red Book; 1977 | 1977 Red Book | 1977-00-00 | MANITOU ISLE | Captain |
| Grosvenor, George Michael; 1977 Red Book; 1977 | 1977 Red Book | 1977-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1978 Red Book; 1978 | 1978 Red Book | 1978-00-00 | ISLAND CLIPPER | Captain |
| Grosvenor, George Michael; 1978 Red Book; 1978 | 1978 Red Book | 1978-00-00 | MANITOU ISLE | Captain |