199.170—Line-throwing appliance.
        
        (a) General.
         Each vessel must have a line-throwing appliance approved under approval series 160.040.
    
    
    
        
        (c) Additional equipment.
         Each vessel must carry the following equipment for the line-throwing appliance—
    
    
    
    
    
    
        
        (iii) 
         Is, if synthetic, of a dark color or certified by the manufacturer to be resistant to deterioration from ultraviolet light.