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Helitrox for PS Diving – Clear Head, Clear Mind in Deep Recoveries?

by Thomas Powell

Thomas Powell PSD Training photo

In the public safety world, gas fills can become complicated. Fire stations must follow OSHA regulations, and fill station operators require training that is not required in standard dive shop environments. If a person were to speak to most current dive team leaders in the United States, they would insist that mixed gasses of any sort, and even basic nitrox, are not allowed in public safety diving programs. Extensive research will show that, in the majority of cases, there are no standing rules preventing the use of nitrox or mixed gas. The reality is that not every public safety dive team has easy access to a fill station. The difficulty acquiring basic air scares team leaders and oversight bodies away from the complications of obtaining gasses that may be even harder, and more expensive, to acquire.

Helitrox is a breathing gas made up of nitrogen, helium, and oxygen. The proper mixtures of these gasses can allow a diver to function and operate at depths beyond the range of standard air fills. In the modern world helitrox is often used by technical divers or commercial divers undergoing complex and often deeper dive activities. To perform technical dives using helitrox, a diver must understand the physiology associated with how the gas can affect the human body underwater, and how to plan for a dive that may involve soft or hard ceilings. To date, advanced mixed gasses have rarely been used in public safety dive training programs or operations. Despite this fact, roughly one year ago, the entire world saw a group of commercial divers, diving helitrox, recover a man who had been submerged in a trapped shipwreck for three days. The gas being used allowed divers to remain underwater and perform an unplanned recovery.

The United States is bordered by two major oceans and consists of a vast number of deep waterways within her interior. When looking at these bodies of water, operational dive teams must recognize that one day they may be called to perform a recovery, or even a rescue, at depth. Imagine that a diver has been trapped at depth while diving helitrox. If a rescue is possible, the team performing the operation must understand the physiology associated with the gas being inspired by the victim. This knowledge will allow the dive team involved to best plan a rescue and return to the surface that does not exacerbate already existing problems.

Similarly, certain bodies of water in the United States exist at altitude. This factor makes even recovery operations go off standard “table diving” scenarios. Essentially, a one hundred foot (deep) recovery dive may be converted to a deeper theoretical depth based on altitude. This factor suggests that divers at altitude may be safer if they have a good knowledge base and understanding of how to use mixed gasses. One of the most interesting things to do with a diver is to let them do comparison dives between helitrox and air. Essentially, let the diver do a dive on helitrox and then later do a dive on air. Then have the diver determine which dive is more memorable. The helitrox dive will be better remembered. This scenario shows that helitrox allows a diver to remain more “clear-headed.”

In the world of public safety diving, being clear-headed and cognizant of all operational activities could save a life. These divers already perform activities in near-zero visibility using a sense of touch. If a problem arises, a clear-headed diver may be more prepared to correct issues or solve problems. Similarly, a clear-headed diver may better remember dive-related details essential to a courtroom scenario.

There is no reason for a dive team to avoid gaining improved levels of knowledge. In many cases, leadership personnel will establish a goal for public safety dive teams. This goal may be the completion of a course such as ERD II. Once that goal is achieved, leadership often turns to team status maintenance. New divers get trained, and current divers do in-service training. This mindset often leads to a lack of focus and the establishment of a normal routine. Education requires a break from this routine and a focus on continued improvement. Even if a dive team does not dive mixed gasses on a regular basis, an understanding of the related dive theory will help dive team members better acknowledge how gas can affect the human body.

Mixed gas diving requires strong education and a focus on learning how to be safe at deeper depths. Despite this, helitrox can allow emergency response divers to perform activities for longer periods, with clearer minds, at deeper depths. A dive team must determine if mixed gas diving could play a role within its territory, and then consider if the team wishes to be available for extended range calls for help in an area exceeding local territory boundaries. At altitude, helitrox diving may be essential to remain safe. Closer to sea level, helitrox diving may be an activity that is beyond the skills set desired by a team. Team leaders must work to make the best decisions possible in regard to team capabilities and knowledge bases.

In North Carolina, the staff at Air Hogs Scuba is working with various dive teams to begin developing a better understanding (for team members) of how gas affects the human body. Three teams are currently working through the TDI Nitrox program as a starting point. The objective is to learn the math, and better understand how to draw personal conclusions regarding how to dive differing gas mixtures. This course is the entry-point for dive teams considering mixed-gas response capabilities. No dive team should turn down educational opportunities provided within reasonable parameters, and helitrox has its place in public safety diving. The reality is that teams have to make the move to become more educated and step outside normal training parameters. Actions of this type will give dive teams greater capabilities, and an improved potential for performing operational activities in expanded environments.

-Thomas Powell
Owner/Instructor Trainer – Air Hogs Scuba

Educating Public Safety Dive Teams Year Around at Air Hogs Scuba

Air Hogs Scuba Pool Training

Most divers seem to believe that the winter months of the year are a time to relax by the fire and enjoy time indoors. Conversely, a small number of divers realize this is the perfect time of year to prepare for the worst possible conditions. Around the United States, public safety dive teams, both volunteer and professional, take to the water. Icy conditions, cold wind, and bulky equipment do not stop these men and women from working hard to be prepared to help others in need.

Dive shops are the backbone of public safety dive teams. In many cases, shops provide the gear (via retail sales), the training, consultation, and general support. At Air Hogs Scuba, in Garner, North Carolina, the training staff has dedicated a large portion of time and effort toward helping public safety dive team members be the best divers they can be. Air Hogs Scuba runs public safety training programs year round in an effort to upgrade team qualifications and to keep dive teams in the water. Long breaks and time out of the water do not help teams retain skill sets and knowledge.

Each January, Air Hogs Scuba runs ERD Dry Suit Ops and ERD Full Face Ops programs to ensure divers can handle dry diving and basic encapsulation when it really matters. Similarly, the shop begins an annual fitness progression and evaluation program for any team willing to participate. From that point forward, the teams always dive dry and in full-face units for future classes. Essentially, divers and teams are better prepared to enter into ERD 1 and 2 or Tender classes, as well as other programs such as contaminated water or swift water. To capitalize on success, the shop has brought together a group of ERDI professionals to handle their needs and the recognized needs of dive teams. Two of these individuals are ERDI Instructor Trainers. In 2014, Thomas Powell, Josh Norris, Darrell Adams, and Rob Bradish combined teaching abilities and shared resources to find ways to better benefit public safety dive teams in North Carolina. This action has led to new programs, shared skill sets, mutual aid between teams, team interactions on an increased level, and improved teaching success. The goal for Air Hogs Scuba (in regard to public safety divers) has become: to better educate divers and improve their capabilities in the realm of emergency response operations.

ERDI programs are designed to teach divers how to be safe, responsible, effective, and skilled during any response operation. The other factors that should be noted in regard to ERDI are the OSHA and NFPA regulations with which they comply. These compliance actions taken by ERDI during program development help teams and departments avoid liability by following certain regulations during both training and operational activities. This is the biggest recognition that sells ERDI classes to dive teams. Companies such as Air Hogs Scuba work to sell the best class possible, while showing teams how to best protect their assets.

Teaching programs at Air Hogs Scuba have become more in-depth, and outside resources are being utilized. ERDI programs are being taught in conjunction with classes provided by the Office of the State Fire Marshall to improve knowledge and understanding based on regional needs. The North Carolina State Justice Academy has even offered a professional certificate for divers who achieve certain public safety diving academic accomplishments. These actions have ensured dive teams recognize the added benefit and value that can be professionally rooted in any ERDI program.

The goal of any public safety dive program within a dive business should be to improve knowledge and the overall skill sets maintained by the divers with which the business works. Well-educated, skilled divers ensure safer response scenarios and improved outcomes. ERDI has provided the avenue through which this goal can be achieved. Dive shops must simply find the best way to make use of the provided resources and help their local communities.

by Thomas Powell Air Hogs Scuba