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Should have used a proof-reader. This sign (photo shot by a friend) could be found to all the entry points of the engine room of a ferry to Vancouver Island (Canada). True, carbon dioxide can kill you, if in high enough concentrations. 
View attachment 29281
View attachment 29281
Hey Guest!
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 

