Gloucester Breakwater (Massachusetts)
Historical Light List Characteristics
| 1908 | F W. | LHB Light List (Atlantic): 96 |
| 1915 | USLHS Light List (Atlantic): 110 | |
| 1917 | Fl W 3s. W9. fl 0.3. | USLHS Light List (Atlantic): 117 |
| 1920 | USLHS Light List (Atlantic): 118 | |
| 1927 | F R. R12. | USLHS Light List (Atlantic): 124 |
| 1931 | USLHS Light List (Atlantic): 126 | |
| 1935 | USLHS Light List (Atlantic): 134 | |
| 1940 | F R. R11. | USCG Light List (Atlantic): 151 |
| 1943 | USCG Light List (Atlantic): 200 | |
| 1945-1947 | ||
| 1950-1952 | ||
| 1953-1955 | USCG Light List - Vol. I-VI: 249 | |
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 271 | |
| 1961 | USCG Light List - Vol. I: 271 | |
| 1963-1965 | F R. R12. | |
| 1966 | USCG Light List - Vol. I: 400 | |
| 1969-1972 | ||
| 1973-1979 | Oc R 4s. R10. ec 1. | |
| 1982 | ||
| 1987 | Oc R 4s. R10. | USCG Light List - Vol. I: 9690 |
| 1990-1992 | USCG Light List - Vol. I: 9455 | |
| 1993-1996 | USCG Light List - Vol. I: 9855 | |
| 2004 |
Historical Light List Optics and Structures
| 1908 | Lens Lantern | N/A | 39 | White wooden tripod on granite mound terminating the breakwater. | LHB Light List (Atlantic): 96 |
| 1915 | N/A | 45 | White; brown, square skeleton substructure. | USLHS Light List (Atlantic): 110 | |
| 1917 | White on brown, square skeleton. | USLHS Light List (Atlantic): 117 | |||
| 1920 | USLHS Light List (Atlantic): 118 | ||||
| 1927 | 37 | USLHS Light List (Atlantic): 124 | |||
| 1931 | Ll ei | USLHS Light List (Atlantic): 126 | |||
| 1935 | USLHS Light List (Atlantic): 134 | ||||
| 1940 | 300 mm e | USCG Light List (Atlantic): 151 | |||
| 1943 | USCG Light List (Atlantic): 200 | ||||
| 1945-1947 | |||||
| 1950 | |||||
| 1951-1952 | White on brown, square skeleton tower. | ||||
| 1953 | N/A | USCG Light List - Vol. I-VI: 249 | |||
| 1954-1955 | White house and tower on brown square skeleton framework. | ||||
| 1957 | |||||
| 1959-1960 | USCG Light List - Vol. I-V: 271 | ||||
| 1961 | USCG Light List - Vol. I: 271 | ||||
| 1963-1965 | |||||
| 1966 | USCG Light List - Vol. I: 400 | ||||
| 1969-1979 | |||||
| 1982 | |||||
| 1987 | USCG Light List - Vol. I: 9690 | ||||
| 1990-1992 | USCG Light List - Vol. I: 9455 | ||||
| 1993-1996 | USCG Light List - Vol. I: 9855 | ||||
| 2004 |
Historical Light List Audible Fog Signals
| 1908 | None | None | LHB Light List (Atlantic): 96 |
| 1915 | Bell; 1 stroke every 20 sec. | USLHS Light List (Atlantic): 110 | |
| 1917 | USLHS Light List (Atlantic): 117 | ||
| 1920 | USLHS Light List (Atlantic): 118 | ||
| 1927 | USLHS Light List (Atlantic): 124 | ||
| 1931 | BELL; 1 stroke every 20 sec. | USLHS Light List (Atlantic): 126 | |
| 1935 | USLHS Light List (Atlantic): 134 | ||
| 1940 | BELL; 1 stroke every 10 sec. | USCG Light List (Atlantic): 151 | |
| 1943 | USCG Light List (Atlantic): 200 | ||
| 1945-1947 | |||
| 1950 | |||
| 1951-1952 | BELL, electric; 1 stroke every 10 sec. | ||
| 1953-1955 | BELL: 1 stroke ev 10s. | USCG Light List - Vol. I-VI: 249 | |
| 1957 | |||
| 1959-1960 | USCG Light List - Vol. I-V: 271 | ||
| 1961 | USCG Light List - Vol. I: 271 | ||
| 1963-1965 | |||
| 1966 | USCG Light List - Vol. I: 400 | ||
| 1969 | |||
| 1970-1972 | HORN, diaphragm; 1 blast ev 10s (1sbl). | ||
| 1973-1975 | HORN, 1 blast ev 10s (1sbl). | ||
| 1976-1979 | HORN: 1 blast ev 10s (1sbl). | ||
| 1982 | HORN: 1 blast ev 10s (1s bl). | ||
| 1987 | HORN: 1 blast ev 10s (1s bl). | USCG Light List - Vol. I: 9690 | |
| 1990-1992 | USCG Light List - Vol. I: 9455 | ||
| 1993-1996 | USCG Light List - Vol. I: 9855 | ||
| 2004 | HORN: 1 blast ev 10s (1s bl). |
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1905 - Present (Exact location of current 1911 lighthouse. Location of 1905 light assumed to be at same location.) |