| Cowan, Henry; 1915 Red Book; 1915 | 1915 Red Book | 1915-00-00 | A. G. BROWER | Chief Engineer |
| Cowan, Henry; 1917 Red Book; 1917 | 1917 Red Book | 1917-00-00 | MONROE C. SMITH | Chief Engineer |
| Cowan, Henry; 1918 Red Book; 1918 | 1918 Red Book | 1918-00-00 | J. F. DUNSTON | Chief Engineer |
| Cowan, Henry; 1919 Red Book; 1919 | 1919 Red Book | 1919-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1920 Red Book; 1920 | 1920 Red Book | 1920-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1921 Red Book; 1921 | 1921 Red Book | 1921-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1922 Red Book; 1922 | 1922 Red Book | 1922-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1923 Red Book; 1923 | 1923 Red Book | 1923-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1924 Red Book; 1924 | 1924 Red Book | 1924-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1925 Red Book; 1925 | 1925 Red Book | 1925-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1927 Red Book; 1927 | 1927 Red Book | 1927-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1928 Red Book; 1928 | 1928 Red Book | 1928-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1929 Red Book; 1929 | 1929 Red Book | 1929-00-00 | J. F. DURSTON | Chief Engineer |
| Cowan, Henry; 1930 Red Book; 1930 | 1930 Red Book | 1930-00-00 | | Fleet Engineer |
| Cowan, Henry; 1931 Red Book; 1931 | 1931 Red Book | 1931-00-00 | | Fleet Engineer |
| Cowan, Henry; 1932 Red Book; 1932 | 1932 Red Book | 1932-00-00 | | Fleet Engineer |
| Cowan, Henry; 1933 Red Book; 1933 | 1933 Red Book | 1933-00-00 | | Fleet Engineer |
| Cowan, Henry; 1934 Red Book; 1934 | 1934 Red Book | 1934-00-00 | | Fleet Engineer |
| Cowan, Henry; 1937 Red Book; 1937 | 1937 Red Book | 1937-00-00 | | Fleet Engineer |
| Cowan, Henry; 1939 Red Book; 1939 | 1939 Red Book | 1939-00-00 | | Fleet Engineer |
| Cowan, Henry; 1940 Red Book; 1940 | 1940 Red Book | 1940-00-00 | | Fleet Engineer |
| Cowan, Henry; 1943 Red Book; 1943 | 1943 Red Book | 1943-00-00 | | Fleet Engineer |
| Cowan, Henry; 1944 Red Book; 1944 | 1944 Red Book | 1944-00-00 | | Fleet Engineer |
| Cowan, Henry; 1947 Red Book; 1947 | 1947 Red Book | 1947-00-00 | | Fleet Engineer |
| Cowan, Henry; 1948 Red Book; 1948 | 1948 Red Book | 1948-00-00 | | Fleet Engineer |
| Cowan, Henry; 1949 Blue Book; 1949 | 1949 Blue Book | 1949-00-00 | G. A. TOMLINSON | First Mate |
| Cowan, Henry; 1950 Red Book; 1950 | 1950 Red Book | 1950-00-00 | | Fleet Engineer |
| Cowan, Henry; 1951 Red Book; 1951 | 1951 Red Book | 1951-00-00 | | Fleet Engineer |
| Cowan, Henry; 1952 Red Book; 1952 | 1952 Red Book | 1952-00-00 | | Fleet Engineer |
| Cowan, Henry; 1953 Red Book; 1953 | 1953 Red Book | 1953-00-00 | | Fleet Engineer |
| Cowan, Henry; 6/48 Great Lakes Review; 1948 | 6/48 Great Lakes Review | 1948-00-00 | | Fleet Engineer |
| Cowan, Henry; Great Lakes News 7/43; 1943 | Great Lakes News 7/43 | 1943-00-00 | FRANK BILLINGS | Second Mate |
| Cowan, Henry; Great Lakes Review, 5/46; 1946 | Great Lakes Review, 5/46 | 1946-00-00 | FRANK BILLINGS | First Mate |
| Cowan, Henry; Great Lakes Review. 1944 | Great Lakes Review. 1944 | 1944-00-00 | FRANK BILLINGS | First Mate |