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Deer Island Thorofare Lighthouse

Fl W 6s🇺🇸Eastern Maine, USOperational

Location & Light Range

About Deer Island Thorofare Lighthouse

This lighthouse was constructed and first lit in 1857. The tower stands 7.5 meters tall, with its focal height reaching 16 meters above sea level. It emits a white light. The structure is located on Penobscot Bay, approximately 1.8 nautical miles west-southwest of Stonington.

Background
Deer Isle Thorofare Light, also known as Mark Island Light, is a lighthouse on Penobscot Bay, Maine, about 1.8 nautical miles (3.3 km; 2.1 mi) west-southwest of Stonington. It was built in 1857.

Light & Optic

Characteristic Signature
Fl W 6s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
6s
Focal Height
16m

Construction & History

Year Built
1857

References & Identifiers

Wikipedia
Read on Wikipedia →
Wikidata
Q5250771 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Height
7.5m

Location

City
Eastern Maine
Country
🇺🇸US
Latitude
44.1344°
Longitude
-68.7033°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Deer Island Thorofare Lighthouse at night?+
Deer Island Thorofare displays the characteristic Fl W 6s — 1 white flash every 6 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.
Which ports and harbors does Deer Island Thorofare Lighthouse guide vessels into?+
Deer Island Thorofare Lighthouse assists vessels approaching 5 nearby ports. The closest is NORTH HAVEN at 7.3 NM to the W. Other ports served include Little Deer Isle (9 NM N), Matanuska (11.3 NM E), Brooksville (12.6 NM N), Camden (15.9 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Deer Island Thorofare Lighthouse still active and maintained?+
Yes, Deer Island Thorofare 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 Deer Island Thorofare Lighthouse?+
You can track vessels near Deer Island Thorofare 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.