149.691—What means of escape are required?
        
        (a) 
         Each deepwater port must have both primary and secondary means of escape. Each of these means must either:
    
    
    
        
        (2) 
         Be designed and installed in compliance with a national consensus standard, as that term is defined in  29 CFR 1910.2, for use in evacuating the port.
    
    
    
    
    
        
        (2) 
         A marine evacuation system, a portable flexible ladder, a knotted manrope, or a similar device determined by the Officer in Charge of Marine Inspection (OCMI) to provide an equivalent or better means of escape.