Cape Spencer (Alaska)
Historical Light List Characteristics
| 1914 | Fl W 5s. W12. fl 0.5. | USLHS Light List (Pacific): 610 |
| 1930-1933 | Fl W 15s. W16. fl 1. | USLHS Light List (Pacific): 1254 |
| 1945 | USCG Light List (Pacific): 2339 | |
| 1950-1951 | ||
| 1952-1957 | USCG Light List - Vol. I-V: 2577 | |
| 1958-1959 | Fl W 7.5s. W16. fl 0.5. | |
| 1960 | Fl W 7.5s. W16. fl 0.24. | |
| 1961-1963 | USCG Light List - Vol. III: 2577 | |
| 1964-1972 | Fl W 7.5s. W16. | USCG Light List - Vol. III: 3232 |
| 1973-1974 | Fl W 10s. W24. | |
| 1975-1977 | USCG Light List - Vol. III: 3281 | |
| 1978-1981 | Fl W 7.5s. W24. | |
| 1982-1984 | Fl W 10s. W24. | |
| 1985 | USCG Light List - Vol. VI: 3281 | |
| 1986 | USCG Light List - Vol. VI: 24240 | |
| 1988 | ||
| 1990 | ||
| 2004 | Fl W 10s. W17. |
Historical Light List Optics and Structures
| 1914 | N/A | 10 | 90 | White; wooden house. | USLHS Light List (Pacific): 610 |
| 1930-1933 | 3 iov | 25 | 105 | White square concrete tower on rectangular concrete building. | USLHS Light List (Pacific): 1254 |
| 1945 | 3 e | USCG Light List (Pacific): 2339 | |||
| 1950-1951 | |||||
| 1952-1960 | N/A | USCG Light List - Vol. I-V: 2577 | |||
| 1961-1963 | USCG Light List - Vol. III: 2577 | ||||
| 1964-1974 | USCG Light List - Vol. III: 3232 | ||||
| 1975-1984 | USCG Light List - Vol. III: 3281 | ||||
| 1985 | USCG Light List - Vol. VI: 3281 | ||||
| 1986 | USCG Light List - Vol. VI: 24240 | ||||
| 1988 | |||||
| 1990 | |||||
| 2004 |
Historical Light List Audible Fog Signals
| 1914 | None | None | USLHS Light List (Pacific): 610 |
| 1930-1933 | DIAPHONE; air: Blast 4 sec., silent 26 sec. | Air siren if diaphone is disabled. | USLHS Light List (Pacific): 1254 |
| 1945 | DIAPHONE, air: Blast 4 sec., silent 26 sec. | None | USCG Light List (Pacific): 2339 |
| 1950-1951 | DIAPHONE; two-tone, air; blast 4 sec., silent 26 sec. | ||
| 1952-1953 | DIAPHONE: two-tone; when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | USCG Light List - Vol. I-V: 2577 | |
| 1954-1960 | DIAPHONE: two-tone; 1 blast ev 30s (4sbl). | ||
| 1961-1963 | USCG Light List - Vol. III: 2577 | ||
| 1964-1965 | USCG Light List - Vol. III: 3232 | ||
| 1966-1972 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1973-1974 | HORN, 1 blast ev 30s (3sbl). | ||
| 1975 | USCG Light List - Vol. III: 3281 | ||
| 1976-1980 | HORN: 1 blast ev 30s (3sbl). | ||
| 1981-1984 | HORN: 1 blast ev 30s (3s bl). | ||
| 1985 | USCG Light List - Vol. VI: 3281 | ||
| 1986 | HORN: 1 blast ev 30s (3s bl). | USCG Light List - Vol. VI: 24240 | |
| 1988 | |||
| 1990 | |||
| 2004 | None |
Historical Light List Other Signals
| 1930-1933 | RADIOBEACON: Transmits single dashes. | USLHS Light List (Pacific): 1254 |
| 1945 | RADIOBEACON: Transmits on 286 kc, single dashes, ( etc.). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
USCG Light List (Pacific): 2339 |
| 1950-1951 | RADIOBEACON: Transmits on 286 kc, single dashes, ( etc.). Antenna lead-in at light tower. DISTANCE-FINDING STATION. |
|
| 1952-1953 | RADIOBEACON: 286 kc (code: etc.). Antenna at light tower. |
USCG Light List - Vol. I-V: 2577 |
| 1954-1958 | RADIOBEACON: 312 kc (code: etc.). Antenna at light tower. |
|
| 1959-1960 | RADIOBEACON: 312 kc (Code: etc.). Antenna at light tower. |
|
| 1961 | USCG Light List - Vol. III: 2577 | |
| 1962-1963 | RADIOBEACON: Antenna at light tower. | |
| 1964-1974 | USCG Light List - Vol. III: 3232 | |
| 1975 | RBN: 286 kHz ( etc.); Antenna at light tower. |
USCG Light List - Vol. III: 3281 |
| 1976-1978 | RBN: 286 kHz ( etc.). Antenna at light tower. |
|
| 1979-1984 | RBN: 286 kHz T ( etc.). Antenna at light tower. |
|
| 1985 | USCG Light List - Vol. VI: 3281 | |
| 1986 | USCG Light List - Vol. VI: 24240 | |
| 1988 | ||
| 1990 | ||
| 2004 | None |
 |
1913 - Present (Assumed the original 1913 lighthouse was located very close to the position of the current 1925 lighthouse.) |