Fort Washington (Maryland)
Historical Light List Characteristics
| 1858 | F W. W6. | LHB Light List (US): 248 |
| 1860 | LHB Light List (US): 233 | |
| 1865-1866 | LHB Light List (All Coasts): 237 | |
| 1868 | LHB Light List (All Coasts): 240 | |
| 1870 | LHB Light List (All Coasts): 253 | |
| 1878 | F W. W9. Arc illuminated N. by W. 1/2 W. by E'd to NW. by W. 1/2 W. | LHB Light List (All Coasts): 321 |
| 1879 | LHB Light List (All Coasts): 325 | |
| 1886 | LHB Light List (All Coasts): 375 | |
| 1888 | LHB Light List (All Coasts): 394 | |
| 1893 | F W. W83/4. | LHB Light List (Atlantic): 467 |
| 1898 | LHB Light List (Atlantic): 563 | |
| 1899 | LHB Light List (Atlantic): 578 | |
| 1905 | F W. | LHB Light List (Atlantic): 671 |
| 1908 | LHB Light List (Atlantic): 728 | |
| 1915 | F R. | USLHS Light List (Atlantic): 1005 |
| 1917 | USLHS Light List (Atlantic): 1041 | |
| 1920 | USLHS Light List (Atlantic): 1093 | |
| 1927 | USLHS Light List (Atlantic): 1177 | |
| 1931 | USLHS Light List (Atlantic): 1500 | |
| 1935 | USLHS Light List (Atlantic): 1857 | |
| 1943 | USCG Light List (Atlantic): 2419 | |
| 1945-1947 | ||
| 1950-1951 | ||
| 1952 | Iso R 6s. | |
| 1953-1955 | USCG Light List - Vol. I-VI: 2704 | |
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 3160 | |
| 1961 | USCG Light List - Vol. I: 3160 | |
| 1963 | ||
| 1965 | ||
| 1966 | USCG Light List - Vol. I: 3436 | |
| 1969-1970 | ||
| 1972 | ||
| 1973-1974 | Iso R 6s. R9. | |
| 1976 | ||
| 1978 | ||
| 1982 | Iso R 6s. R7. | |
| 1987 | Fl R 6s. R7. | USCG Light List - Vol. II: 12690 |
| 1990-1992 | USCG Light List - Vol. II: 16775 | |
| 1993-1996 | USCG Light List - Vol. II: 18560 | |
| 2004 | Fl R 6s. R6. |
Historical Light List Optics and Structures
| 1858 | 6th | N/A | N/A | N/A | LHB Light List (US): 248 |
| 1860 | LHB Light List (US): 233 | ||||
| 1865 | LHB Light List (All Coasts): 237 | ||||
| 1866 | |||||
| 1868 | LHB Light List (All Coasts): 240 | ||||
| 1870 | LHB Light List (All Coasts): 253 | ||||
| 1878 | 17 | A wooden tower, white. Stands near end of wharf. A small dwelling attached to the tower, painted white; lantern, red. | LHB Light List (All Coasts): 321 | ||
| 1879 | LHB Light List (All Coasts): 325 | ||||
| 1886 | 17 | White tower, with red lantern. Dwelling in rear of tower. | LHB Light List (All Coasts): 375 | ||
| 1888 | White tower, with black lantern. Dwelling in rear of tower. | LHB Light List (All Coasts): 394 | |||
| 1893 | 141/2 | LHB Light List (Atlantic): 467 | |||
| 1898 | LHB Light List (Atlantic): 563 | ||||
| 1899 | LHB Light List (Atlantic): 578 | ||||
| 1905 | Lens Lantern | 28 | 28 | White, fog-bell tower, lantern on top. Dwelling in rear of tower. | LHB Light List (Atlantic): 671 |
| 1908 | Lantern on white, fog-bell tower; dwelling in rear of tower. | LHB Light List (Atlantic): 728 | |||
| 1915 | N/A | 32 | Lantern on white bell tower. | USLHS Light List (Atlantic): 1005 | |
| 1917 | USLHS Light List (Atlantic): 1041 | ||||
| 1920 | White; lantern on fog bell tower. | USLHS Light List (Atlantic): 1093 | |||
| 1927 | USLHS Light List (Atlantic): 1177 | ||||
| 1931 | Ll ei | White lantern on fog-bell tower. | USLHS Light List (Atlantic): 1500 | ||
| 1935 | USLHS Light List (Atlantic): 1857 | ||||
| 1943 | Ll e | Red lantern on fog-bell tower. | USCG Light List (Atlantic): 2419 | ||
| 1945-1947 | |||||
| 1950-1952 | 300 mm e | ||||
| 1953-1955 | N/A | N/A | USCG Light List - Vol. I-VI: 2704 | ||
| 1957 | |||||
| 1959-1960 | Red lantern on fogbell tower. | USCG Light List - Vol. I-V: 3160 | |||
| 1961 | USCG Light List - Vol. I: 3160 | ||||
| 1963 | |||||
| 1965 | |||||
| 1966 | USCG Light List - Vol. I: 3436 | ||||
| 1969-1970 | Red triangular daymark on fogbell tower. | ||||
| 1972-1974 | TR on fogbell tower. | ||||
| 1976 | |||||
| 1978 | |||||
| 1982 | TR on tower. | ||||
| 1987 | USCG Light List - Vol. II: 12690 | ||||
| 1990-1992 | USCG Light List - Vol. II: 16775 | ||||
| 1993-1996 | USCG Light List - Vol. II: 18560 | ||||
| 2004 |
Historical Light List Audible Fog Signals
| 1858 | None | None | LHB Light List (US): 248 |
| 1860 | LHB Light List (US): 233 | ||
| 1865-1866 | LHB Light List (All Coasts): 237 | ||
| 1868 | LHB Light List (All Coasts): 240 | ||
| 1870 | LHB Light List (All Coasts): 253 | ||
| 1878 | LHB Light List (All Coasts): 321 | ||
| 1879 | LHB Light List (All Coasts): 325 | ||
| 1886 | Bell struck by machinery every 15 sec. | LHB Light List (All Coasts): 375 | |
| 1888 | LHB Light List (All Coasts): 394 | ||
| 1893 | LHB Light List (Atlantic): 467 | ||
| 1898 | LHB Light List (Atlantic): 563 | ||
| 1899 | LHB Light List (Atlantic): 578 | ||
| 1905 | LHB Light List (Atlantic): 671 | ||
| 1908 | Bell struck by machinery a single blow every 15 sec. | LHB Light List (Atlantic): 728 | |
| 1915 | Bell; 1 stroke every 15 sec. | USLHS Light List (Atlantic): 1005 | |
| 1917 | USLHS Light List (Atlantic): 1041 | ||
| 1920 | USLHS Light List (Atlantic): 1093 | ||
| 1927 | Bell; 1 stroke every 10 sec. | USLHS Light List (Atlantic): 1177 | |
| 1931 | BELL; 1 stroke every 10 sec. | USLHS Light List (Atlantic): 1500 | |
| 1935 | BELL; 1 stroke every 10 sec. (e) | USLHS Light List (Atlantic): 1857 | |
| 1943 | BELL, electric; 1 stroke every 10 sec. | USCG Light List (Atlantic): 2419 | |
| 1945-1947 | |||
| 1950-1951 | |||
| 1952 | BELL, electric; 1 stroke every 30 sec. | ||
| 1953-1955 | BELL: 1 stroke ev 30s. | USCG Light List - Vol. I-VI: 2704 | |
| 1957 | |||
| 1959-1960 | USCG Light List - Vol. I-V: 3160 | ||
| 1961 | USCG Light List - Vol. I: 3160 | ||
| 1963 | |||
| 1965 | |||
| 1966 | USCG Light List - Vol. I: 3436 | ||
| 1969-1970 | BELL: 1 stroke ev 15s. | ||
| 1972-1974 | |||
| 1976 | |||
| 1978 | |||
| 1982 | None | ||
| 1987 | USCG Light List - Vol. II: 12690 | ||
| 1990-1992 | USCG Light List - Vol. II: 16775 | ||
| 1993-1996 | USCG Light List - Vol. II: 18560 | ||
| 2004 |
 |
1857 - Present (Assumed original 1857 light was very close to same position.) |