Fog Signal Distance Finding for Overfalls Lightship (1954-1961)

For 2 minutes For 1 minute
RBN Off 52
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  FS Gp of 2 blasts ev 20s
(1.5s bl-3s si-1.5bl-14ssi)
14 1
 
 14 1
 
 3 1
 
 33
 
 
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 5
 
 
  Shows of dash of RBN or
 blast of fog signal.
Figures show seconds.
RBN Code: