The support urges the ledge or mandible engaging support surface into engagement with {TAIL ~ the mandible} to support the head of person in {HEAD ~ a suspend position} and to concurrently transport the mandible anterior of a persons body to maintain an open airway 
The support urges the ledge or mandible engaging support surface into engagement with { TAIL ~ the mandible } to support the head of person in { HEAD ~ a suspend position } and to concurrently transport the mandible anterior of a persons body to maintain an open airway
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH