Ever wondered how we learn and how we retain what we learned? Have you noticed that you will retain less than 100% of the material presented? Furthermore, because you zone out, get distracted, or do not comprehend, you are not even cognizant of the things you see and hear during the class. Every time a,
During a dive, clipping gear to D-rings provides easy access to items we use most often. Reels, lights, primary SMB’s and line arrows are good examples of items we use often on a dive.
However, we bring some items “just in case”. Many of these items could present an entanglement issue if stored externally. Pockets are often the best place to store these items.
For example, spare masks, gloves, secondary cutting
Staying warm during the dive is not just a matter of comfort. As we have learned from the 2007 NEDU study, it also affects our decompression and, subsequently, our DCS risk. Supplemental insulation provided by dry and wet suits will shift the Lower Critical Temperature (which is the ambient temperature at which heat production responses are initiated) to lower values and thus, delays the onset of core cooling as water tempera
Although alluded to in your initial rebreather training, the idea of ‘optimal loop volume’ escapes some divers. Even among advanced rebreather divers, the loop appears to be managing them instead of them managing their loop. They learned to cope, instead of, to control it.
Many of us may be familiar with the NEDU study:SXLLM Gerth WA, Ruterbusch VL, Long ET – The Influence of Thermal Exposure on Diver Susceptibility to Decompression Sickness Technical Report. Panama City (FL); Navy Experimental Diving Unit; 2007. Report No: 06-07 http://archive.rubicon-foundation.org/xmlui/bitstream/handle/123456789/5063/NEDU_2007_06.pdf However, some divers have mistaken the data to mean that they should be,
Many of us are familiar with the concept of PFO’s and how they may be responsible for allowing bubbles to cross from the venous (pulmonary) to the arterial side. When this occurs, we are talking about a Right-Left Shunt, RLS and a potentially increased risk for developing Type II DCS. There are other sources that,
“Because rocket fuel is too expensive.” This was one of the reasons that Add Helium Staff Instructor Robert Johnson cited for his interest in rebreathers. He wanted to go where few people had gone and see something amazing. Talking about space, he said, “Look how far you would have to go before you get to,
By October of 2007, I had become an Optima diver. Trading in my doubles for a rebreather was a careful decision; one involving research and asking questions. I certainly did not want to buy a “garage made” rebreather and Dive Rite, a major manufacturer of technical diving equipment, was presenting a “factory made” rebreather. Eventually,,
In today’s world, navigating available rebreather information can be confusing, frustrating, and misleading. Consumers enquiring about rebreathers are often surprised by how disconnected the industry is. Over the years the Add Helium staff has had the pleasure of speaking with many people that wish to purchase a rebreather. Usually, we are not the first rebreather,
It is not a secret that obesity is a growing problem in the United States. Obesity is getting daily exposure on the TV networks, radio stations, newspapers, and magazines. While standing in the supermarket checkout line, one is tempted to read magazine headlines promising wonder-diets and exercise routines to transform the overweight in only a,