Graves Ledge

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Source of Image: Karl Agre (USA)
Date of Image: January 1st, 2004


International Designation Number:



Latitude 42 21 54" N
Longitude 70 52 09" W
Body of water Outer Boston Harbor.


Date of Establishment: 1905
Date Light First Lit: 1905
Designer Royal Luther.
Is structure still operating? Yes. Automated 1976. Solar 2001.
Characteristic Two White flashes every 12sec, day and night.