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San Juan Graving Dock Range Rear Lighthouse

Oc Green 4s🇺🇸Río Piedras, USOperational

Location & Light Range

About San Juan Graving Dock Range Rear Lighthouse

This skeletal red tower, featuring a white vertical stripe, stands 22 meters tall with a focal height of 25.5 meters. It is located in San Juan, Puerto Rico, within Parque Central beside the bridge on Highway 2. The light emits an occulting green signal, a single flash every four seconds. Its geographic range extends to 14.4 nautical miles. The tower also includes a daymark.

Why it matters: This range rear light is essential for guiding vessels into the San Juan Graving Dock, providing precise alignment within the busy southeastern corner of San Juan harbor.

Light & Optic

Characteristic Signature
Oc Green 4s
Flash Type
Occulting
Light Color
Green
Interval
4s
Raw Code
Oc G 4s
Focal Height
25.5m
Geographic Range
14.4NM

Location

City
Río Piedras
Country
🇺🇸United States
Region
Puerto Rico
Sea Region
San Juan harbor, specifically at the southeastern corner, in Parque Central beside the bridge on highway 2 (Avenida John F. Kennedy).
Latitude
18.4403°
Longitude
-66.0817°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
22m
Tower Shape
skeletal
Tower Color
red with a white vertical stripe

Structure: A 22m square skeletal tower with a daymark, painted red with a white vertical stripe.

References & Identifiers

Nearest Port
Porto Nuevo(0.4 km)
Admiralty No.
J5505.1
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Frequently Asked Questions

How do mariners identify San Juan Graving Dock Range Rear Lighthouse at night?+
San Juan Graving Dock Range Rear displays the characteristic Oc Green 4s. 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 San Juan Graving Dock Range Rear Lighthouse guide vessels into?+
San Juan Graving Dock Range Rear Lighthouse assists vessels approaching 5 nearby ports. The closest is Porto Nuevo at 0.4 NM to the SSW. Other ports served include San Juan (1.8 NM WNW), NAGUABO (25.7 NM SE), FAJARDO (26.4 NM ESE), PALMAS DEL MAR (27.1 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is San Juan Graving Dock Range Rear Lighthouse still active and maintained?+
Yes, San Juan Graving Dock 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 San Juan Graving Dock Range Rear Lighthouse?+
You can track vessels near San Juan Graving Dock 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.