| Williamson, Sigfred G.; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | KEYWEST | Captain |
| Williamson, Sigfred G.; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | KEYWEST | Captain |
| Williamson, Sigfred G.; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | KEYWEST | Captain |
| Williamson, Sigfred G.; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | KEYVIVE | Captain |
| Williamson, Sigfred G.; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | KEYVIVE | Captain |
| Williamson, Sigfred G.; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | KEYVIVE | Captain |
| Williamson, Sigfred G.; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | KEYVIVE | Captain |
| Williamson, Sigfred G.; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | KEYVIVE | Captain |
| Williamson, Sigfred G.; 1935 Red Book; 1935 | 1935 Red Book | 1935-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1936 Red Book; 1936 | 1936 Red Book | 1936-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1938 Red Book; 1938 | 1938 Red Book | 1938-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | KEYNOR | Captain |
| Williamson, Sigfred G.; 1941 Red Book; 1941 | 1941 Red Book | 1941-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1942 Red Book; 1942 | 1942 Red Book | 1942-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1946 Red Book; 1946 | 1946 Red Book | 1946-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1947 Red Book; 1947 | 1947 Red Book | 1947-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1948 Red Book; 1948 | 1948 Red Book | 1948-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1949 Red Book; 1949 | 1949 Red Book | 1949-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1950 Red Book; 1950 | 1950 Red Book | 1950-00-00 | JOHN A. MCDOUGALD | Captain |
| Williamson, Sigfred G.; 1951 Red Book; 1951 | 1951 Red Book | 1951-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1952 Red Book; 1952 | 1952 Red Book | 1952-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1953 Red Book; 1953 | 1953 Red Book | 1953-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1954 Red Book; 1954 | 1954 Red Book | 1954-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1955 Red Book; 1955 | 1955 Red Book | 1955-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1956 Red Book; 1956 | 1956 Red Book | 1956-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1957 Red Book; 1957 | 1957 Red Book | 1957-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1958 Red Book; 1958 | 1958 Red Book | 1958-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1959 Red Book; 1959 | 1959 Red Book | 1959-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1960 Red Book; 1960 | 1960 Red Book | 1960-00-00 | EASTERN SHELL | Captain |
| Williamson, Sigfred G.; 1961 Red Book; 1961 | 1961 Red Book | 1961-00-00 | BAYSHELL | Captain |