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Alonso (Puerto Deseado Outer Range Rear) Lighthouse

Iso red 2s🇦🇷AROperational

Location & Light Range

About Alonso (Puerto Deseado Outer Range Rear) Lighthouse

The Alonso lighthouse, also known as Puerto Deseado Outer Range Rear, is a 23-meter tall cylindrical steel tower painted black with an orange vertical stripe. Its daymark panels are located at the top. This structure serves as the rear light for an outer range, working with a front range light to create an alignment guiding vessels near Puerto Deseado, Argentina. With a focal height of 40 meters, it emits an isophase red light with a geographic range of 17.1 nautical miles. The site is open to the public, though the tower itself is closed.

Why it matters: This lighthouse provides a critical rear range alignment for vessels approaching Puerto Deseado, ensuring safe passage through the entrance channel and supporting regional shipping.

Light & Optic

Characteristic Signature
Iso red 2s
Flash Type
Isophase
Light Color
red
Interval
2s
Raw Code
Iso.R
Focal Height
40m
Geographic Range
17.1NM

Location

Country
🇦🇷Argentina
Region
Santa Cruz
Sea Region
Located near Puerto Deseado, Argentina, serving as the rear light for an outer range.
Latitude
-47.7559°
Longitude
-65.9025°

References & Identifiers

Nearest Port
Puerto Deseado(0.2 km)
Admiralty No.
G1140.1
NGA No.
19928

Tower & Structure

Tower Height
23m
Tower Shape
cylindrical
Tower Color
black with an orange vertical stripe
Material
steel

Structure: steel post; the top of the tower carries daymark panels colored black with an orange vertical stripe

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Alonso (Puerto Deseado Outer Range Rear) Lighthouse at night?+
Alonso (Puerto Deseado Outer Range Rear) displays the characteristic Iso red 2s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Alonso (Puerto Deseado Outer Range Rear) Lighthouse guide vessels into?+
Alonso (Puerto Deseado Outer Range Rear) Lighthouse assists vessels approaching 1 nearby port. The closest is Puerto Deseado at 0.2 NM to the SE. Mariners should consult the relevant chart for full approach and pilotage information.
Is Alonso (Puerto Deseado Outer Range Rear) Lighthouse still active and maintained?+
Yes, Alonso (Puerto Deseado Outer Range Rear) 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 Alonso (Puerto Deseado Outer Range Rear) Lighthouse?+
You can track vessels near Alonso (Puerto Deseado Outer Range Rear) 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.