Sentinel Island (Alaska)
Historical Light List Characteristics
| 1906 | F W. W143/4. | LHB Light List (Dist. 12-13): 254 |
| 1911 | F W. W14. | USLHS Light List (16th-18th): N/A |
| 1913 | F W. W12. | USLHS Light List (16th): N/A |
| 1914 | USLHS Light List (Pacific): 598 | |
| 1930-1933 | Fl(2) W 6s. W15. fl 0.3, ec 0.9, fl 0.3, ec 4.5. | USLHS Light List (Pacific): 1220 |
| 1945 | Fl(2) W 10s. W15. fl 1, ec 1, fl 1, ec 7. | USCG Light List (Pacific): 2294 |
| 1950-1951 | ||
| 1952-1960 | USCG Light List - Vol. I-V: 2530 | |
| 1961-1963 | USCG Light List - Vol. III: 2530 | |
| 1964 | USCG Light List - Vol. III: 3184 | |
| 1965-1972 | Fl W 5s. W15. | |
| 1973-1974 | Fl W 5s. W17. | |
| 1975 | USCG Light List - Vol. III: 3230 | |
| 1976-1984 | Fl W 10s. W17. | |
| 1985 | USCG Light List - Vol. VI: 3230 | |
| 1986 | USCG Light List - Vol. VI: 23850 | |
| 1988 | Fl W 10s. W15. | |
| 1990 | Fl W 10s. W13. | |
| 2004 | Fl W 10s. W14. Obscured 152°-296°(144°). |
Historical Light List Optics and Structures
| 1906 | 4th | 42 | 82 | White, square tower attached to the center of the westerly front of a white, square, double, two-story dwelling with brown roof. | LHB Light List (Dist. 12-13): 254 |
| 1911 | N/A | N/A | White. Square tower, attached to center of dwelling. | USLHS Light List (16th-18th): N/A | |
| 1913 | 4 o | 82 | White. Square tower on building. | USLHS Light List (16th): N/A | |
| 1914 | N/A | 42 | White; square tower on building. | USLHS Light List (Pacific): 598 | |
| 1930 | 4 a | 49 | White square tower on dwelling. | USLHS Light List (Pacific): 1220 | |
| 1931-1933 | 4 ei | ||||
| 1945 | 4 e | 51 | 86 | White square tower on fog signal building. | USCG Light List (Pacific): 2294 |
| 1950-1951 | |||||
| 1952-1960 | N/A | USCG Light List - Vol. I-V: 2530 | |||
| 1961-1963 | USCG Light List - Vol. III: 2530 | ||||
| 1964-1974 | USCG Light List - Vol. III: 3184 | ||||
| 1975-1984 | USCG Light List - Vol. III: 3230 | ||||
| 1985 | USCG Light List - Vol. VI: 3230 | ||||
| 1986 | USCG Light List - Vol. VI: 23850 | ||||
| 1988 | |||||
| 1990 | |||||
| 2004 | N/A |
Historical Light List Audible Fog Signals
| 1906 | Daboll trumpet; blasts 5 sec., silent intervals 25 sec. | None | LHB Light List (Dist. 12-13): 254 |
| 1911 | None | USLHS Light List (16th-18th): N/A | |
| 1913 | 3d-cl. reed horn: Blast 5 sec. Silent 25 sec. | USLHS Light List (16th): N/A | |
| 1914 | USLHS Light List (Pacific): 598 | ||
| 1930-1933 | DIAPHONE, air; blast 5 sec., silent 25 sec. | 3d-cl. reed horn, if diaphone is disabled. | USLHS Light List (Pacific): 1220 |
| 1945 | DIAPHONE, air; blast 5 sec., silent 25 sec. | None | USCG Light List (Pacific): 2294 |
| 1950-1951 | |||
| 1952-1953 | DIAPHONE: When operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | USCG Light List - Vol. I-V: 2530 | |
| 1954-1960 | DIAPHONE: When operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | ||
| 1961 | USCG Light List - Vol. III: 2530 | ||
| 1962-1963 | DIAPHONE: 1 blast ev 30s (5sbl). | ||
| 1964 | USCG Light List - Vol. III: 3184 | ||
| 1965-1966 | HORN, diaphragm; 1 blast ev 30s (5sbl). | ||
| 1967-1972 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1973-1974 | HORN, 1 blast ev 30s (3sbl). | ||
| 1975 | Horn, 1 blast ev 30s (3sbl). | USCG Light List - Vol. III: 3230 | |
| 1976-1980 | HORN: 1 blast ev 30s (3sbl). | ||
| 1981-1984 | HORN: 1 blast ev 30s (3s bl). | ||
| 1985 | USCG Light List - Vol. VI: 3230 | ||
| 1986 | HORN: 1 blast ev 30s (3s bl). | USCG Light List - Vol. VI: 23850 | |
| 1988 | |||
| 1990 | |||
| 2004 | None |
Historical Light List Other Signals
| 1930-1933 | RADIOBEACON: Transmits gps. of 1 dash, 1 dot, and 1 dash. | USLHS Light List (Pacific): 1220 |
| 1945 | RADIOBEACON: Transmits on 298 kc, groups of dash, dot, dash (  ). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
USCG Light List (Pacific): 2294 |
| 1950-1951 | RADIOBEACON: Transmits on 298 kc, groups of dash, dot, dash (). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
|
| 1952-1960 | RADIOBEACON: 298 kc (Code: ). Antenna at light tower. |
USCG Light List - Vol. I-V: 2530 |
| 1961 | USCG Light List - Vol. III: 2530 | |
| 1962-1963 | None | |
| 1964-1974 | USCG Light List - Vol. III: 3184 | |
| 1975-1984 | USCG Light List - Vol. III: 3230 | |
| 1985 | USCG Light List - Vol. VI: 3230 | |
| 1986 | USCG Light List - Vol. VI: 23850 | |
| 1988 | ||
| 1990 | ||
| 2004 |
 |
1902 - Present (Approximate location of current 1935 lighthouse. Location of original 1902 lighthouse assumed to be very close.) |