TM 1-4220-250-12&P
b.
Once deployed, the inflated LRU-18/U's C02 cells will give the raft sufficient firmness and shape to allow
boarding. In order to board the raft, the aircrew member should first position himself in front of the raft. Then
he should reach back and grasp both sides of the raft, pushing downward and sliding the raft under himself.
Aircrew members can also roll into raft by grasping one side of the raft, pushing down on the side and rolling
body into raft. The boarding procedure will take approximately 15 seconds.
c.
When boarding has been completed, the survivor should evaluate the situation-how much time before rescue-
and decide when and if oral inflation and helmet bailing should be accomplished. Oral inflation takes
approximately 2.5 minutes; helmet bailing also takes about 2.5 minutes. If it is determined that both actions
should be completed, these actions can be accomplished in any order.
d.
The LRU-18/U, when subjected to helicopter rotor wash, will become airborne if unmanned. When rescue is
about to take place, the survivor should remove the container assembly and throw it overboard in order for it
to sink and act as an anchor. Open the oral inflation valves, to reduce freeboard and push down on one side
of the raft to take on water. This will prevent the raft from being caught in the rotor wash. This also prevents
the rotor wash from blowing the aircrew members away from the helicopter.
SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
2.5 UNUSUAL ENVIRONMENT/WEATHER.
When on land, the one-man life raft can be used as a temporary shelter, as a sleeping platform, and for crossing
streams and rivers.
2-5/(2-6 Blank)
