Lighthouses and Lightships With Fog Signals for North Atlantic (1970)

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3- Diaphone
1- Horn

Lighthouses with Audible Fog Signals

Boston Lightship MA DIAPHONE: 1 blast ev 30s (3sbl). N42 20.400 W070 45.500
Nantucket Shoals Lightship MA DIAPHONE, two-tone; 1 blast ev 30s (3sbl). when operating, is synchronized with radiobeacon ev 6 minutes for distance finding. N40 30.000 W069 28.000
Portland Lightship ME DIAPHONE, 1 blast ev 30s (3sbl). N43 31.600 W070 05.500
Five Fathom Bank Lightship NJ HORN, diaphragm; 1 blast ev 30s (2sbl). N38 47.300 W074 34.600