[io] 



Plale SV 



IXPERIMENTS. 



:e Bay , □ Black & Re 



:. 



Red 



Black . 



rpool Bar Light" Ship. Black , 

 ecambe Bay Light Ship, Reo 



Liverpool Bar Light- Ship, --''^^ 



ri of the^ stations 



aZeli/^ the positioTis wTiere^ thcftsTt have 



