National Museum of American History, Behring Center

Lighthouse Postcards

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Halfway Rock postcard face - click to enlarge

Halfway Rock postcard obverse - click to enlarge

Locate on NOAA nautical chart

Halfway Rock

State: ME
Year established: 1871
Latitude: 43 deg 39 min 21 sec N
Longitude: 70 deg 2 min 12 sec W
Height above sea level: 77 feet

Original construction:
76-foot white granite tower attached to dwelling

Automated in 1975; active aid to navigation; buildings other than tower destroyed by storms

Light characteristic:
Flashing red every 5 seconds, visible for 19 nautical miles; fog signal, 2 blasts every 30 seconds

More information:
Roberts, B., & Jones, R., American Lighthouses; A Comprehensive Guide, (Old Saybrook, CT: Globe Pequot Press, 1998), p. 39