Southwest Pass Entrance (Louisiana)
Historical Light List Characteristics
| 1954-1955 | Fl W 10s. W13. fl 2. | USCG Light List - Vol. I-VI: 5453 |
| 1957 | ||
| 1959 | USCG Light List - Vol. I-V: 6432 | |
| 1960 | Fl W 10s. W13. fl 0.3. | |
| 1961 | USCG Light List - Vol. II: 6432 | |
| 1963 | ||
| 1965 | ||
| 1966 | Fl W 10s. W15. fl 0.1. | |
| 1969-1970 | Fl W 10s. W15. | USCG Light List - Vol. II: 168 |
| 1972 | ||
| 1973-1974 | Fl W 10s. W27. | |
| 1976 | Fl W 10s. W24. | |
| 1978 | ||
| 1982 | ||
| 1990 | Fl W 10s. W23. | USCG Light List - Vol. IV: 425 |
| 2004 | Fl W 10s. W21. | USCG Light List - Vol. IV: 455 |
Historical Light List Optics and Structures
| 1954-1955 | N/A | N/A | 51 | White dwelling on black piles with detached fog signal house on black piles. | USCG Light List - Vol. I-VI: 5453 |
| 1957 | |||||
| 1959-1960 | USCG Light List - Vol. I-V: 6432 | ||||
| 1961 | USCG Light List - Vol. II: 6432 | ||||
| 1963 | |||||
| 1965 | |||||
| 1966 | 85 | Red tower on white dwelling on piles. In 12 feet. | |||
| 1969-1970 | USCG Light List - Vol. II: 168 | ||||
| 1972-1974 | |||||
| 1976 | |||||
| 1978 | Tower on white dwelling on piles. In 12 feet. | ||||
| 1982 | |||||
| 1990 | Tower on white dwelling on piles. | USCG Light List - Vol. IV: 425 | |||
| 2004 | N/A | N/A | 85 | Tower on white dwelling on piles. | USCG Light List - Vol. IV: 455 |
Historical Light List Audible Fog Signals
| 1954-1955 | DIAPHONE: when operating, is synchronized with radiobeacon ev 3 minutes for distance finding. | None | USCG Light List - Vol. I-VI: 5453 |
| 1957 | |||
| 1959-1960 | USCG Light List - Vol. I-V: 6432 | ||
| 1961 | USCG Light List - Vol. II: 6432 | ||
| 1963 | DIAPHONE: 1 blast ev 15s (2sbl). | ||
| 1965 | |||
| 1966 | HORN, diaphragm; 1 blast ev 15s (2sbl). | ||
| 1969-1970 | USCG Light List - Vol. II: 168 | ||
| 1972 | |||
| 1973-1974 | HORN, 1 blast ev 15s (2sbl). | ||
| 1976 | HORN: 1 blast ev 15s (2sbl). | ||
| 1978 | |||
| 1982 | HORN: 1 blast ev 15s (2s bl). | ||
| 1990 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). | USCG Light List - Vol. IV: 425 | |
| 2004 | HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). | USCG Light List - Vol. IV: 455 |
Historical Light List Other Signals
| 1954-1955 | RADIOBEACON: 300 kc (Code:  ). Antenna 55 feet 339° from light. |
USCG Light List - Vol. I-VI: 5453 |
| 1957 | RADIOBEACON: 320 kc (Code: ). Antenna 55 feet 339° from light. |
|
| 1959-1960 | USCG Light List - Vol. I-V: 6432 | |
| 1961 | USCG Light List - Vol. II: 6432 | |
| 1963 | RADIOBEACON: Antenna 55 feet 339° from light. | |
| 1965 | ||
| 1966 | RADIOBEACON: Antenna on light tower. | |
| 1969-1970 | USCG Light List - Vol. II: 168 | |
| 1972-1974 | RADIOBEACON: Antenna on light tower. Special Radio Direction Finder Calibration Service (290 and 480 kHz,   , Antenna is located at light tower.). |
|
| 1976 | RBN: 320 kHz ()I. Antenna on light tower. Special Radio Direction Finder Calibration Service (290 and 480 kHz, , Antenna is located at light tower.). |
|
| 1978 | RBN: 307 kHz (). Antenna on light tower. Special Radio Direction Finder Calibration Service (290 and 480 kHz, J4 , Antenna is located at light tower.). |
|
| 1982 | RBN: 307 kHz OT (). Antenna on light tower. Special Radio Direction Finder Calibration Service (290 and 480 kHz, J4 , Antenna is located at light tower.). |
|
| 1990 | RBN: 307 kHz OT (). Antenna on light tower. |
USCG Light List - Vol. IV: 425 |
| 2004 | None | USCG Light List - Vol. IV: 455 |
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1953 - 1964 (Approximate location.) |
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1965 - Present (Location of 2007 light. Assumed the 1965 light was near this location.) |