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Prescott Heritage Harbour Lighthouse

Iso Green 4s🇨🇦CAOperational

Location & Light Range

About Prescott Heritage Harbour Lighthouse

An octagonal wood tower standing 6 meters tall, the Prescott Heritage Harbour lighthouse is painted white with green lantern and gallery. It emits an isophase green light every 4 seconds from a focal height of 7.5 meters, providing a geographic range of 9.5 nautical miles. Established in the late 1980s, this structure marks the entrance to Sandra S. Lawn Harbour in downtown Prescott, Ontario. It is situated directly across the St. Lawrence River from Ogdensburg, New York, at the end of the main breakwater. The Canadian Coast Guard manages this active aid to navigation.

Why it matters: This lighthouse is essential for guiding vessels into Sandra S. Lawn Harbour and preventing collisions with the breakwater. Its distinctive green light provides a clear signal for mariners approaching Prescott, ensuring safe access for local recreational and commercial traffic.

Light & Optic

Characteristic Signature
Iso Green 4s
Flash Type
Isophase
Light Color
Green
Interval
4s
Raw Code
Iso G 4s
Focal Height
7.5m
Geographic Range
9.5NM

Location

Country
🇨🇦Canada
Region
Ontario
Sea Region
St. Lawrence River, marking the entrance to Prescott Harbour (now Sandra S. Lawn Harbour) in downtown Prescott, Ontario, directly across from Ogdensburg, New York.
Latitude
44.7099°
Longitude
-75.5095°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
6m
Tower Shape
octagonal
Tower Color
white
Material
wood

Structure: octagonal wood tower with lantern and gallery, painted white; lantern and gallery are green

References & Identifiers

Nearest Port
Prescott(0.3 km)
Admiralty No.
H2727
USCG No.
7-0975
ARLHS No.
CAN-767
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Frequently Asked Questions

How do mariners identify Prescott Heritage Harbour Lighthouse at night?+
Prescott Heritage Harbour displays the characteristic Iso 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 Prescott Heritage Harbour Lighthouse guide vessels into?+
Prescott Heritage Harbour Lighthouse assists vessels approaching 5 nearby ports. The closest is Prescott at 0.2 NM to the SW. Other ports served include Ogdensburg (1 NM ESE), JOHNSTOWN (2.1 NM NE), Cardinal (7 NM NE), Morristown (9.5 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Prescott Heritage Harbour Lighthouse still active and maintained?+
Yes, Prescott Heritage Harbour 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 Prescott Heritage Harbour Lighthouse?+
You can track vessels near Prescott Heritage Harbour 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.