Patos Island (Washington)
Historical Light List Characteristics
| 1894 | F R. | LHB Light List (Dist. 12-13): 1012 |
| 1895 | LHB Light List (Dist. 12-13): 1031 | |
| 1896 | LHB Light List (Dist. 12-13): 1142 | |
| 1900 | LHB Light List (Dist. 12-13): 190 | |
| 1906 | LHB Light List (Dist. 12-13): 241 | |
| 1911 | Fl W 5s. | USLHS Light List (16th-18th): N/A |
| 1914 | Fl W 5s. W12. fl 1. | USLHS Light List (Pacific): 447 |
| 1930-1933 | Fl W 5s. W13. fl 1. | USLHS Light List (Pacific): 911 |
| 1945 | USCG Light List (Pacific): 1801 | |
| 1950-1951 | ||
| 1952-1960 | USCG Light List - Vol. I-V: 1976 | |
| 1961-1963 | Fl W 5s. W13. fl 0.2. | USCG Light List - Vol. III: 1976 |
| 1964-1970 | Fl W 5s. W13. | USCG Light List - Vol. III: 2528 |
| 1971 | Fl W 5s. W12. | |
| 1972 | Fl WR 5s. W12, R12. R013°-060°(47°), W060°-0981/2°(381/2°), R0981/2°-1131/2°(15°), W1131/2°-013°(2591/2°). | |
| 1973-1974 | Fl WR 5s. W15, R12. R013°-060°(47°), W060°-0981/2°(381/2°), R0981/2°-1131/2°(15°), W1131/2°-013°(2591/2°). | |
| 1975-1979 | Fl WR 5s. W14, R12. R013°-060°(47°), W060°-0981/2°(381/2°), R0981/2°-1131/2°(15°), W1131/2°-013°(2591/2°). | USCG Light List - Vol. III: 2623 |
| 1980-1984 | Fl WR 6s. W9, R6. R013°-060°(47°), W060°-0981/2°(381/2°), R0981/2°-1131/2°(15°), W1131/2°-013°(2591/2°). | |
| 1985 | USCG Light List - Vol. VI: 2623 | |
| 1986 | USCG Light List - Vol. VI: 19825 | |
| 1988 | ||
| 1990 | ||
| 2004 | Fl WR 6s. W9, R6. R0111/2°-0591/2°(48°), W0591/2°-097°(371/2°), R097°-114°(17°), W114°-0111/2°(2571/2°). |
Historical Light List Optics and Structures
| 1894 | Lens Lantern | 10 | 30 | Lantern on a white stake. | LHB Light List (Dist. 12-13): 1012 |
| 1895 | LHB Light List (Dist. 12-13): 1031 | ||||
| 1896 | LHB Light List (Dist. 12-13): 1142 | ||||
| 1900 | 281/2 | LHB Light List (Dist. 12-13): 190 | |||
| 1906 | LHB Light List (Dist. 12-13): 241 | ||||
| 1911 | 4th | N/A | N/A | White. Square tower; on roof of fog signal building. | USLHS Light List (16th-18th): N/A |
| 1914 | N/A | 33 | 50 | White; square frame tower on fog signal house. | USLHS Light List (Pacific): 447 |
| 1930-1933 | 4 iov | 38 | 52 | White square frame tower on fog signal house. | USLHS Light List (Pacific): 911 |
| 1945 | 4 e | USCG Light List (Pacific): 1801 | |||
| 1950-1951 | |||||
| 1952-1960 | N/A | White square tower on fog signal house. | USCG Light List - Vol. I-V: 1976 | ||
| 1961-1963 | USCG Light List - Vol. III: 1976 | ||||
| 1964-1974 | USCG Light List - Vol. III: 2528 | ||||
| 1975-1984 | USCG Light List - Vol. III: 2623 | ||||
| 1985 | USCG Light List - Vol. VI: 2623 | ||||
| 1986 | USCG Light List - Vol. VI: 19825 | ||||
| 1988 | |||||
| 1990 | |||||
| 2004 |
Historical Light List Audible Fog Signals
| 1894 | Daboll trumpet; blasts 2 sec., silent intervals 18 sec. | None | LHB Light List (Dist. 12-13): 1012 |
| 1895 | LHB Light List (Dist. 12-13): 1031 | ||
| 1896 | LHB Light List (Dist. 12-13): 1142 | ||
| 1900 | LHB Light List (Dist. 12-13): 190 | ||
| 1906 | LHB Light List (Dist. 12-13): 241 | ||
| 1911 | None | USLHS Light List (16th-18th): N/A | |
| 1914 | 3d-cl. reed horn: Blast 4 sec. Silent 16 sec. | USLHS Light List (Pacific): 447 | |
| 1930-1933 | HORN, 3d-cl. reed: Blast 4 sec., silent 16 sec. | USLHS Light List (Pacific): 911 | |
| 1945 | DIAPHONE, air; blast 3 sec., silent 27 sec. | USCG Light List (Pacific): 1801 | |
| 1950-1951 | |||
| 1952-1953 | DIAPHONE: when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | USCG Light List - Vol. I-V: 1976 | |
| 1954-1959 | DIAPHONE: when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | ||
| 1960 | HORN, diaphragm; when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | ||
| 1961 | USCG Light List - Vol. III: 1976 | ||
| 1962-1963 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1964-1972 | USCG Light List - Vol. III: 2528 | ||
| 1973-1974 | HORN, 1 blast ev 30s (3sbl). | ||
| 1975 | HORN, 1 blast ev 30s (3sbl). Operates continuously. | USCG Light List - Vol. III: 2623 | |
| 1976-1980 | HORN: 1 blast ev 30s (3sbl). Operates continuously. | ||
| 1981-1984 | HORN: 1 blast ev 30s (3s bl). Operates continuously. | ||
| 1985 | USCG Light List - Vol. VI: 2623 | ||
| 1986 | HORN: 1 blast ev 30s (3s bl). Operates continuously. | USCG Light List - Vol. VI: 19825 | |
| 1988 | |||
| 1990 | |||
| 2004 | HORN: 1 blast ev 30s (3s bl). |
Historical Light List Other Signals
| 1930-1933 | None | USLHS Light List (Pacific): 911 |
| 1945 | RADIOBEACON: Transmits on 314 kc., groups of dash, dot, dash (  ). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
USCG Light List (Pacific): 1801 |
| 1950-1951 | RADIOBEACON: Transmits on 314 kc., groups of dash, dot, dash (). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
|
| 1952-1960 | RADIOBEACON: 314 kc (Code: ). Antenna at light tower. |
USCG Light List - Vol. I-V: 1976 |
| 1961 | USCG Light List - Vol. III: 1976 | |
| 1962-1963 | RADIOBEACON: Antenna at light tower. | |
| 1964-1974 | USCG Light List - Vol. III: 2528 | |
| 1975-1984 | None | USCG Light List - Vol. III: 2623 |
| 1985 | USCG Light List - Vol. VI: 2623 | |
| 1986 | USCG Light List - Vol. VI: 19825 | |
| 1988 | ||
| 1990 | ||
| 2004 |
 |
1893 - Present (Exact location of current 1908 lighthouse. Location of original 1893 lighthouse assumed to be close.) |