Dry Tortugas (Florida)
Historical Light List Characteristics
| 1858 | F W. W20. | LHB Light List (US): 314 |
| 1860 | LHB Light List (US): 298 | |
| 1865 | LHB Light List (All Coasts): 303 | |
| 1866 | LHB Light List (All Coasts): 307 | |
| 1868 | LHB Light List (All Coasts): 311 | |
| 1870 | LHB Light List (All Coasts): 310 | |
| 1878 | F W. W19. | LHB Light List (All Coasts): 398 |
| 1879 | LHB Light List (All Coasts): 412 | |
| 1886 | F W. W181/2. | LHB Light List (All Coasts): 533 |
| 1888 | LHB Light List (All Coasts): 565 | |
| 1893 | F W. W181/4. | LHB Light List (Atlantic): 753 |
| 1898 | F WR. W181/4, R181/4. Red sector from NE. by N. northward to ENE. 1/2 E. | LHB Light List (Atlantic): 871 |
| 1899 | LHB Light List (Atlantic): 882 | |
| 1905 | F W. W181/4. | LHB Light List (Atlantic): 1039 |
| 1908 | LHB Light List (Atlantic): 1139 | |
| 1915 | Fl W 20s. W19. fl 1. | USLHS Light List (Atlantic): 1595 |
| 1917 | USLHS Light List (Atlantic): 1710 | |
| 1920 | USLHS Light List (Atlantic): 1782 | |
| 1927 | USLHS Light List (Atlantic): 1967 | |
| 1931 | USLHS Light List (Atlantic): 2279 | |
| 1935 | USLHS Light List (Atlantic): 2914 | |
| 1943 | USCG Light List (Atlantic): 3319 | |
| 1945-1947 | ||
| 1950-1952 | Fl W 20s. W18. fl 1. | |
| 1953-1955 | Fl W 20s. W19. fl 1. | USCG Light List - Vol. I-VI: 3779 |
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 4388 | |
| 1961 | USCG Light List - Vol. II: 4388 | |
| 1963 | ||
| 1965-1966 | ||
| 1969-1970 | Fl W 20s. W19. | USCG Light List - Vol. II: 95 |
| 1972 | ||
| 1973-1974 | Fl W 20s. W28. | |
| 1976 | ||
| 1978 | ||
| 1982 | ||
| 1990 | USCG Light List - Vol. III: 1210 | |
| 1994 | Fl W 20s. W24. | USCG Light List - Vol. III: 810 |
| 2004 | Fl W 20s. W20. | USCG Light List - Vol. III: 1095 |
Historical Light List Optics and Structures
| 1858 | 1st | 150 | 152 | Tower circular, 150 feet high, built of brick; keeper's dwelling two stories high, built of brick, and placed a little south of the tower. | LHB Light List (US): 314 |
| 1860 | LHB Light List (US): 298 | ||||
| 1865 | Tower circular, 150 feet high, built of brick; keeper's dwelling, two stories high, built of brick, and placed a little south of the tower. | LHB Light List (All Coasts): 303 | |||
| 1866 | LHB Light List (All Coasts): 307 | ||||
| 1868 | LHB Light List (All Coasts): 311 | ||||
| 1870 | Tower circular, 150 feet high, built of brick, and painted the lower half white, and the upper black; the keeper's dwelling two stories high, built of brick, and placed a little south of the tower. | LHB Light List (All Coasts): 310 | |||
| 1878 | Tower circular, 150 feet high, built of brick, the lower half white and the upper black; the keeper's dwelling two stories high, built of yellow brick, and placed a little south of the tower. | LHB Light List (All Coasts): 398 | |||
| 1879 | Tower circular, 150 feet high, built of brick, the lower half white, and the upper half, lantern, and dome, black; the keeper's dwelling two stories high, built of yellow brick, and placed a little south of the tower. | LHB Light List (All Coasts): 412 | |||
| 1886 | Conical tower; the lower half, white; the upper half, lantern, and dome, black. Oil-room near tower, dwelling short distance to southward, both of yellow brick. | LHB Light List (All Coasts): 533 | |||
| 1888 | LHB Light List (All Coasts): 565 | ||||
| 1893 | 1491/2 | Conical tower; lower half, white; upper half, lantern, and dome, black. Oil room near tower; dwelling a short distance to southward; both of yellow brick. | LHB Light List (Atlantic): 753 | ||
| 1898 | LHB Light List (Atlantic): 871 | ||||
| 1899 | LHB Light List (Atlantic): 882 | ||||
| 1905 | 1451/2 | 1502/3 | Conical tower; lower half, white; upper half, lantern, and dome, black. Oilhouse near tower; dwelling a short distance to southward; both of yellow brick. | LHB Light List (Atlantic): 1039 | |
| 1908 | Conical tower; lower half, white; upper half, lantern, and dome, black. Oilhouse near tower; dwelling a short distance to S'd; both of yellow brick. | LHB Light List (Atlantic): 1139 | |||
| 1915 | N/A | 157 | 151 | Conical tower; lower half white, upper half black. | USLHS Light List (Atlantic): 1595 |
| 1917 | USLHS Light List (Atlantic): 1710 | ||||
| 1920 | Conical tower; lower half white; upper half black. | USLHS Light List (Atlantic): 1782 | |||
| 1927 | Conical tower; lower half white, upper half black. | USLHS Light List (Atlantic): 1967 | |||
| 1931 | 2 iov | USLHS Light List (Atlantic): 2279 | |||
| 1935 | 2 ei | USLHS Light List (Atlantic): 2914 | |||
| 1943 | 2 e | USCG Light List (Atlantic): 3319 | |||
| 1945-1947 | |||||
| 1950-1952 | |||||
| 1953-1955 | N/A | Conical tower, lower half white, upper half black. | USCG Light List - Vol. I-VI: 3779 | ||
| 1957 | |||||
| 1959-1960 | USCG Light List - Vol. I-V: 4388 | ||||
| 1961 | USCG Light List - Vol. II: 4388 | ||||
| 1963 | |||||
| 1965-1966 | |||||
| 1969-1970 | USCG Light List - Vol. II: 95 | ||||
| 1972-1974 | |||||
| 1976 | |||||
| 1978 | |||||
| 1982 | |||||
| 1990 | 86 | USCG Light List - Vol. III: 1210 | |||
| 1994 | N/A | USCG Light List - Vol. III: 810 | |||
| 2004 | USCG Light List - Vol. III: 1095 |
Historical Light List Other Signals
| 1927 | None | USLHS Light List (Atlantic): 1967 |
| 1931 | RADIOBEACON: Transmits gps. of 3 dashes. | USLHS Light List (Atlantic): 2279 |
| 1935 | RADIOBEACON: Transmits gps.  . |
USLHS Light List (Atlantic): 2914 |
| 1943 | RADIOBEACON: Transmits on 286 kc, groups of 3 dashes, dot ( ). |
USCG Light List (Atlantic): 3319 |
| 1945 | RADIOBEACON: Transmits on 286 kc, groups of 3 dashes, dot (). Antenna lead-in 30 feet 261° from light tower. |
|
| 1946-1947 | RADIOBEACON: Transmits on 286 kc, groups of 3 dashes, dot () Antenna lead-in 30 feet 261° from light tower. |
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| 1950-1952 | ||
| 1953-1954 | RADIOBEACON: 286 kc (Code: ) Antenna 30 feet 261° from light tower. |
USCG Light List - Vol. I-VI: 3779 |
| 1955 | RADIOBEACON: 286 kc (Code: ) Antenna 365 feet 233° from light tower. |
|
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 4388 | |
| 1961 | USCG Light List - Vol. II: 4388 | |
| 1963 | RADIOBEACON: Antenna 365 feet 233° from light tower. | |
| 1965-1966 | ||
| 1969-1970 | USCG Light List - Vol. II: 95 | |
| 1972-1974 | ||
| 1976 | RBN: 286 kHz ( ). Antenna 365 feet 233° from light tower. |
|
| 1978 | ||
| 1982 | RBN: 286 kHz OE(). Antenna 365 feet 233° from light tower. |
|
| 1990 | RBN: 286 kHz OE (). Whip antenna on platform 144° 269 yards from light. |
USCG Light List - Vol. III: 1210 |
| 1994 | None | USCG Light List - Vol. III: 810 |
| 2004 | USCG Light List - Vol. III: 1095 |
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1858 - Present |