Fog Signal Distance Finding for Cape Decision (1954-1955)

For 2 minutes For 1 minute
RBN Off 52
<––––Code––––>
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5
 
  FS Gp of 2 blasts ev 30s
(2sbl-4ssi-2sbl-22ssi)
53
 
 
1
 
1
 
5
 
 
 Shows of dash of RBN or
 blast of fog signal.
Figures show seconds.
RBN Code: