. Turn the topping-off valve cap 1 1/2 turns
to the right when the assembly hose is attached.
. Pump the handle until desired inflation is
. Then turn the valve cap 1 1/2 turns to the
. Remove the hand pump and secure it in
the accessory container.
NOTE: The main flotation tube is divided
into two separate sections by an internal bulkhead.
This design feature prevents the life raft from
completely deflating if for some reason the tube
Righting Procedures. The LRU-12/A life
raft may inflate upside down. To correct this
problem proceed as follows:
1. Locate the righting line on the side of the
raft opposite the CO2 bottle.
2. Toss it over the life raft on the side where
the CO2 bottle is located.
3. Grasp the righting line and climb onto the
bottom of the raft. Pull the righting line from the
far side and at the same time stand up and push
the near side of the life raft away with your feet.
This will cause the life raft to flip over.
Boarding Procedures. In most cases, there
are four or more survivors in the water. Upon
reaching the life raft, grasp the lifeline to keep
the raft from drifting away until your turn to
board. Use the boarding stirrup and the boarding
handles at the stem to board the life raft; survivors
should board one at a time.
The first survivor to board the life raft should
assist the remaining survivors and ensure the life
raft loading is balanced to protect against
LRU-15/A LIFE RAFT ASSEMBLY. The
LRU-15/A life raft assembly (fig. 5-23) consists
of a 20-man life raft and an inflation assembly
( C O2 cylinder with an inflation valve). The raft
is orange and has two single compartments,
circular flotation tubes connected by an equalizer
tube, a noninflatable floor suspended between the
two flotation tubes, and two boarding ramps. One
ramp is attached to each tube on opposite sides
of the raft. The floor has an inflatable floor
support. The life raft also features a sea anchor,
a lifeline, boarding handles, and topping-off
valves located on each side of the flotation tubes
and floor support. The life raft and accessory
container are contained in the LRU-15/A carry-
ing case. The life raft assembly is stowed either
in an accessible area inside the fuselage (droppable
type) or in a life raft compartment (wing or
fuselage installation) of the aircraft.
Inflation Procedures. The wing-installed
LRU-15/A life raft assembly is automatically
ejected and inflated from the life raft compart-
ment of the aircraft when the compartment door
is released. To inflate the droppable LRU-15/A
life raft, you perform the following steps:
. Locate the inflation assembly actuating
handle outside the end flap of the carrying case.
l Pull the actuating handle with sufficient
force to actuate the inflation assembly. Ensure
that adequate space is provided for the raft to
NOTE: This is a very large life raft and
should never be inflated inside an aircraft.
Righting Procedures. Because of the large
s i z e a n d c u m b e r s o m e c o n f i g u r a t i o n o f t he
LRU-15/A life raft, it is designed with identical
components on each side so that the raft is always
right side up.
board the LRU-15/A using the boarding ramps
on the lower flotation tube (boarding is possible
over the ramp attached to the upper tube but is
extremely difficult and therefore not recom-
mended). As you board the life raft, grasp the
handles provided and kick with your feet to pull
yourself into the life raft. Boarding can be
accomplished more easily and quickly if survivors
are assisted by those who board first.
The first person in the life raft is responsible
for installing the equalizer clamp. The clamp is
in a pocket located next to the equalizer tube. The
equalizer clamp is necessary to prevent the life raft
from completely deflating in the event one side
of the life raft has a tear or puncture.
RAFTSMANSHIP. We assume that with all
the advanced rescue equipment and technology
available to the Navy, a rescue can be effected
in a few hours. However, the possibility exists that
you may spend days or even weeks at sea.