Holland Island Bar (Maryland)
Historical Light List Characteristics
| 1893 | F W. W113/4. | LHB Light List (Atlantic): 469 |
| 1898 | LHB Light List (Atlantic): 565 | |
| 1899 | LHB Light List (Atlantic): 580 | |
| 1905 | LHB Light List (Atlantic): 673 | |
| 1908 | LHB Light List (Atlantic): 730 | |
| 1915 | F W. W12. | USLHS Light List (Atlantic): 1008 |
| 1917 | USLHS Light List (Atlantic): 1044 | |
| 1920 | USLHS Light List (Atlantic): 1096 | |
| 1927 | USLHS Light List (Atlantic): 1183 | |
| 1931 | USLHS Light List (Atlantic): 1186 | |
| 1935 | Fl(2) W 10s. W12. fl 1, ec 1, fl 1, ec 7. | USLHS Light List (Atlantic): 1450 |
| 1943 | USCG Light List (Atlantic): 1899 | |
| 1945-1947 | ||
| 1950-1952 | ||
| 1953-1955 | USCG Light List - Vol. I-VI: 2063 | |
| 1957 | ||
| 1959-1960 | USCG Light List - Vol. I-V: 2451 | |
| 1961 | Fl(2) W 10s. W11. fl 1, ec 1, fl 1, ec 7. | USCG Light List - Vol. I: 2451 |
| 1963 | ||
| 1965 | ||
| 1966 | Fl(2) W 10s. W12. fl 1, ec 1, fl 1, ec 7. | USCG Light List - Vol. I: 2730 |
| 1969-1970 | IQ W 8s. W8. | |
| 1972-1974 | IQ W 10s. W8. | |
| 1976 | ||
| 1978 | ||
| 1982 | ||
| 1987 | USCG Light List - Vol. II: 2860 | |
| 1990-1992 | Fl W 2.5s. W7. | USCG Light List - Vol. II: 6955 |
| 1993-1996 | USCG Light List - Vol. II: 7545 | |
| 2004 | Fl W 2.5s. W7. | USCG Light List - Vol. II: 7545 |
Historical Light List Optics and Structures
| 1893 | 4th | N/A | 42 | White hexagonal screw-pile structure, with green shutters; piles and roof, brown; lantern, black. Stands in 9 feet at mean low water. | LHB Light List (Atlantic): 469 |
| 1898 | White hexagonal screw-pile structure, with green shutters; piles and roof, brown; lantern, black. In 9 feet of water. | LHB Light List (Atlantic): 565 | |||
| 1899 | LHB Light List (Atlantic): 580 | ||||
| 1905 | LHB Light List (Atlantic): 673 | ||||
| 1908 | White, hexagonal, screw-pile structure, with green shutters; brown piles and roof; black lantern. In 9 feet of water. | LHB Light List (Atlantic): 730 | |||
| 1915 | N/A | White; hexagonal; on brown piles. In 11/2 fathoms. | USLHS Light List (Atlantic): 1008 | ||
| 1917 | White, hexagonal; on brown piles. In 11/2 fathoms. | USLHS Light List (Atlantic): 1044 | |||
| 1920 | USLHS Light List (Atlantic): 1096 | ||||
| 1927 | USLHS Light List (Atlantic): 1183 | ||||
| 1931 | 4 iov | White hexagonal on brown piles. In 9 feet. | USLHS Light List (Atlantic): 1186 | ||
| 1935 | 4 ei | USLHS Light List (Atlantic): 1450 | |||
| 1943 | 4 e | USCG Light List (Atlantic): 1899 | |||
| 1945-1947 | |||||
| 1950-1952 | |||||
| 1953-1955 | N/A | White hexagonal tower on brown piles. In 9 feet. | USCG Light List - Vol. I-VI: 2063 | ||
| 1957 | |||||
| 1959-1960 | USCG Light List - Vol. I-V: 2451 | ||||
| 1961 | N/A | N/A | 37 | White hexagonal tower on brown piles. In 9 feet. | USCG Light List - Vol. I: 2451 |
| 1963 | |||||
| 1965 | White square house on brown piles. In 9 feet. | ||||
| 1966 | USCG Light List - Vol. I: 2730 | ||||
| 1969-1970 | Black and white checkered diamond daymark on white square house on brown piles. In 9 feet. | ||||
| 1972-1973 | NB on white square house on brown piles. In 9 feet. | ||||
| 1974 | JR on white square house on piles. In 9 feet. | ||||
| 1976 | |||||
| 1978 | |||||
| 1982 | |||||
| 1987 | NB on white square house on piles. | USCG Light List - Vol. II: 2860 | |||
| 1990-1992 | USCG Light List - Vol. II: 6955 | ||||
| 1993-1996 | USCG Light List - Vol. II: 7545 | ||||
| 2004 |
Historical Light List Audible Fog Signals
| 1893 | Bell struck by machinery every 10 sec. | None | LHB Light List (Atlantic): 469 |
| 1898 | LHB Light List (Atlantic): 565 | ||
| 1899 | LHB Light List (Atlantic): 580 | ||
| 1905 | LHB Light List (Atlantic): 673 | ||
| 1908 | Bell struck by machinery a single blow every 10 sec. | LHB Light List (Atlantic): 730 | |
| 1915 | Bell; 1 stroke every 10 sec. | USLHS Light List (Atlantic): 1008 | |
| 1917 | USLHS Light List (Atlantic): 1044 | ||
| 1920 | USLHS Light List (Atlantic): 1096 | ||
| 1927 | Air siren: blast 7 sec., silent 3 sec. | USLHS Light List (Atlantic): 1183 | |
| 1931 | SIREN, air: Blast 7 sec., silent 3 sec. | USLHS Light List (Atlantic): 1186 | |
| 1935 | DIAPHONE, air; gp. 2 blasts every 20 sec.; blast 2 sec., silent 2 sec., blast 2 sec., silent 14 sec. | USLHS Light List (Atlantic): 1450 | |
| 1943 | DIAPHONE, air; group of 2 blasts every 20 sec.; blast 2 sec., silent 2 sec., blast 2 sec., silent 14 sec. | Bell, 1 stroke every 10 seconds, if diaphone disabled. | USCG Light List (Atlantic): 1899 |
| 1945 | |||
| 1946-1947 | DIAPHONE, air: group of 2 blasts every 20 sec.; blast 2 sec., silent 2 sec., blast 2 sec., silent 14 sec. | ||
| 1950-1952 | |||
| 1953-1955 | DIAPHONE: gp of 2 blasts ev 20s (2sbl-2ssi-2sbl-14ssi). | Bell, 1 stroke ev 10s if diaphone is disabled. | USCG Light List - Vol. I-VI: 2063 |
| 1957 | |||
| 1959-1960 | USCG Light List - Vol. I-V: 2451 | ||
| 1961 | HORN, diaphragm; 1 blast ev 20s (2sbl-18ssi). | None | USCG Light List - Vol. I: 2451 |
| 1963 | |||
| 1965 | |||
| 1966 | USCG Light List - Vol. I: 2730 | ||
| 1969-1970 | HORN, diaphragm; 1 blast ev 30s (3sbl). | ||
| 1972 | |||
| 1973-1974 | HORN, 1 blast ev 30s (3sbl). | ||
| 1976 | HORN: 1 blast ev 30s (3sbl). | ||
| 1978 | |||
| 1982 | HORN: 1 blast ev 30s (3s bl). | ||
| 1987 | HORN: 1 blast ev 30s (3s bl). | USCG Light List - Vol. II: 2860 | |
| 1990-1992 | USCG Light List - Vol. II: 6955 | ||
| 1993-1996 | USCG Light List - Vol. II: 7545 | ||
| 2004 | HORN: 1 blast ev 30s (3s bl). |
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1889 - Present (Modern replacement light was built on original foundation.) |