PISTA BLOG#33 (2024) HUET at PISTA-An Overview
HELICOPTER UNDERWATER ESCAPE
TRAINING (HUET) at PISTA-An Overview.
Underwater
escape is crucial for helicopter travel safety. The Offshore Oil
and gas industry training organisation (OPITO) has been placing increased focus
on this subject and operators need to know the best practices for helicopter
underwater escape training (HUET). We at PISTA Blog Team interviewed HUET
training Experts in the PISTA training team on factors affecting escapes, training topics, delivery methods, and safety
improvements. PISTA has been providing OPITO approved training since 2018
and is a regional pioneer in the field of Offshore Oil and gas safety training.
HELICOPTER UNDERWATER ESCAPE TRAINING (HUET)
“To escape a submerging helicopter, individuals must overcome panic, disorientation, confusion, impaired vision when underwater, loss of balance, a sense of being adrift, misjudgements of surroundings, and, in certain regions of the world, extreme cold as well” says Amirtharaj a HUET trainer at PISTA.
He adds “Several factors can hinder escape to an Aviation life
raft, including preparedness, physical characteristics of the helicopter,
bodily functions, and mental state. Effective bracing for impact (BRACE! BRACE!! BRACE!!!)can help minimize
some of these injuries.”
When a helicopter plunges into water, it’s highly probable that it
will capsize, causing water, fuel, oil, and debris to rapidly flood the
Helicopter cabin. The sudden and forceful entry into the water can generate
significant turbulence, further complicating the situation for those inside,
observes Mathan Karmel, a HUET trainer at PISTA.
"Submersion
can happen at any moment, often to depths that make survival impossible.
Disorientation, confusion, fear, blurred vision, loss of equilibrium, a sense
of disconnection from surroundings, distorted perceptions, and in certain
regions, the effects of extreme cold, are all challenges that passengers may
face and must overcome to safely exit the submerged helicopter," he
explains.
“….and
even after successfully escaping, survivors may still find themselves in a
potentially dangerous marine environment. This is why Sea Survival Techniques
are incorporated into the comprehensive and mandatory safety training program,
BOSIET, for all Offshore Oil and Gas Industry personnel” he adds on.
Mathan also notes that underwater disorientation and disorderly
evacuation can occur in water crashes. Disordered evacuation happens when everyone tries
to exit through the same opening. Underwater disorientation is caused by body
rotation and the loss of gravity, making it difficult to orient oneself before
escaping from an inverted, sunken helicopter.
In-rushing water has four serious consequences:
- PANIC: Fear
of drowning.
- HYPERVENTILATION: Rapid
breathing that reduces breath-holding ability.
- MOVEMENT: Can
cause severe disorientation.
- COLD
WATER: Water below 50°F can lead to panic, hyperventilation, reduced
breath-holding, and cardiac arrest if not wearing a protective suit.
Limited vision also hinders orientation. Buoyancy can make
it difficult to escape, especially for those who aren't agile or experienced
underwater.
Survivors often run out of air while attempting to escape. They may struggle
to release their harness, untangle from their headset, and navigate through
debris. Holding your breath or using a compressed air device is crucial for
underwater escape, especially in cold water.
The most common cause of death in survivable accidents is injuries
before escape. Contact injuries are more likely than acceleration injuries. Adopting a
good crash position can reduce the risk of head, arm, and leg injuries. Staying
still in your seat can minimize disorientation during and after a crash,
especially in accidents with smoke, fire, or sudden water intrusion.
Mathan believes survival suits and life rafts , communication devices
are valuable. Survival suits should be comfortable, easy to use, durable, and
affordable. They must slow down hypothermia. Life rafts can be difficult to
deploy from an inverted, submerged helicopter.
TRAINING IS
THE KEY AND AT PISTA HUET TRAINING FOCUSES ON:
- Effective
bracing for impact.
- Locating
exits and seat buckles.
- Timely
ejection of exit windows.
- Using
emergency breathing systems (EBS).
CHALLENGES TO OVERCOME DURING ESCAPE ARE:
- In-rushing
water, fire, smoke, fuel, and darkness.
- Releasing
harness/Safety Belt and finding escape hatch/window.
- Disorientation,
equipment hindrance, cold, injury, being pinned, being blocked, and
reduced breath-holding.
- Post-escape
hazards: drowning, hypothermia, rescue injuries.
ESSENTIAL KNOWLEDGE ON BOARD AN AVIATION LIFE RAFT:
- Personal
equipment (survival suit, life preserver, breathing devices, knives,
flashlights, flares).
- Proper
use and care of equipment.
REALISTIC TRAINING MODULES are enacted ,with aircraft doors, windows, hatches, and exit systems.
The
Training Manager at PISTA, when asked about the HUET DELIVERY AND THE BEST
PRACTICES FOLLOWED AT PISTA says:
- HUET
training are comprehensive as per OPITO standards.
- The
Module covers all aspects of survival in a marine environment.
- Training
Includes underwater egress with and without emergency breathing
apparatus.
He goes on to add…."Training arrangements at PISTA include:"
- HUET
instructors and two safety divers, Pool safety personnel, remote crane
operators and training safety look-outs and medical personnel on standby.
- Training
emphasizes use of personal protective equipment, particularly immersion
or Aviation transit /survival suits. Instructions also include proper
wearing, donning, doffing procedures.
- Trainings
include Practical demonstrations of surface and inverted abandonments.
- Surface
abandonments before inverted position.
- Successful
completion of all necessary unassisted escapes.
- Sessions
include crash position demonstrations and EBS training.
- EBS usage and Life jackets deployments, life raft deployment.
The trainers at PISTA feel that HUET should be mandatory for all
aircrews and passengers flying overwater. The PISTA training team is also
excited that Compressed air emergency breathing apparatus
(CA-EBS) will soon be part of the curriculum at PISTA -The 1st OPITO
approved Training centre in Southern India Region.
Labels: #1stinindia, #HUET, #OPITO, #OPITOAPPROVED, #OPITOINDIA, #PISTAPONDY, #safetytraining, #TRAININGFORWOMEN, #TRAININGINPONDY, PISTA



