San Gregorio Lighthouse

Fl W 5s🇦🇷Region Patagonia/ Provincia del Chubut/ Dept Ameghino/ Bahía San Gregorio, AROperational

Location & Light Range

About San Gregorio Lighthouse

San Gregorio lighthouse is a 30-meter square concrete tower located in the Patagonia region, within the Provincia del Chubut. The structure features a yellow exterior adorned with black diagonal stripes. It emits a single white flash as its characteristic. The focal height of the light is 172 meters above sea level, with a geographic range of 13 nautical miles.

Light & Optic

Characteristic Signature
Fl W 5s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
5s
Raw Code
Fl.W.
Focal Height
172m
Geographic Range
13NM

Location

City
Region Patagonia/ Provincia del Chubut/ Dept Ameghino/ Bahía San Gregorio
Country
🇦🇷AR
Latitude
-45.0248°
Longitude
-65.6292°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
30m
Tower Shape
square
Tower Color
black and yellow
Material
concrete

Structure: Yellow square concrete tower, black diagonal stripes; 30

References & Identifiers

Admiralty No.
G1089.4
NGA No.
19764
Wikipedia
Read on Wikipedia →
Wikidata
Q5856318 →
OpenStreetMap
View on OSM →
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Frequently Asked Questions

How do mariners identify San Gregorio Lighthouse at night?

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San Gregorio displays the characteristic Fl W 5s — 1 white flash every 5 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.

Is San Gregorio Lighthouse still active and maintained?

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Yes, San Gregorio 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 San Gregorio Lighthouse?

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You can track vessels near San Gregorio 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.

What is the San Gregorio lighthouse used for?

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It is a fixed navigational aid on the coast at Region Patagonia/ Provincia del Chubut/ Dept Ameghino/ Bahía San Gregorio, AR. Mariners identify it by its light characteristic — the pattern, colour and timing of its flashes — which is unique among the lights in its area, so a bearing on it fixes a vessel’s position without instruments.