Quote:
	
	
		
			
				
					Originally Posted by  Lynn Eades
					 
				 
				I have since found that the floor in my Canadian hull is 3/16" (a bit less than 4.0 mm) 
			
		 | 
	
	
 Actually 3/16" = 4.7625mm
               5/32" = 3.96875mm
It was normal practice in the UK in WW2 to specify armour plate in mm. Also spark plugs were generally metric here by then too.
David