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maritime DC & PPE Information Center
 
personnel protection
Submarine Inflatable Life Preservers (For submarine use)

There are three types of inflatable life preservers used by general shipboard personnel. They are either inflated by carbon dioxide (CO2) cylinders or inflated orally by the use of an oral inflation tube. These life preservers are as follows:
  1. MK-1 Vest Type
  2. Auto-Inflatable Utility Life Preserver (AIULP) - no longer being procured but may be used until no longer service. MK-1 vest type life preserver is authorized to replace the AIUL