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Gretna Lighthouse

Fl G 4s🇺🇸Louisiana, USOperational

Location & Light Range

About Gretna Lighthouse

This lighthouse operates in Louisiana. Its focal height reaches 12 meters above sea level. The light emitted is green.

Light & Optic

Characteristic Signature
Fl G 4s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
4s
Focal Height
12m

Nearby Vessels

Flag
Type
Name
Dist.

Location

City
Louisiana
Country
🇺🇸US
Latitude
29.9258°
Longitude
-90.0584°
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Frequently Asked Questions

How do mariners identify Gretna Lighthouse at night?+
Gretna displays the characteristic Fl G 4s — 1 green flash every 4 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The green color may indicate a specific sector or warning zone.
Which ports and harbors does Gretna Lighthouse guide vessels into?+
Gretna Lighthouse assists vessels approaching 5 nearby ports. The closest is Etna at 0.7 NM to the SW. Other ports served include Chalmette (1.5 NM NNE), Lawrence (1.5 NM NNE), Marrero (2.9 NM WSW), West Wego (4.3 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gretna Lighthouse still active and maintained?+
Yes, Gretna Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
How can I track vessels near Gretna Lighthouse?+
You can track vessels near Gretna Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.