What You Need to Know About Scuba Tanks

Scuba Tanks pic
Scuba Tanks
Image: padi.com

Dawn Johnson of San Antonio is a veteran insurance and financial services executive. A former member of the executive council of USAA, Dawn Johnson spends some of her free time scuba diving.

Scuba tanks are what hold divers’ air reserves while underwater, allowing them to swim with fish for extended periods of time. They are made from a variety of materials, including aluminum and steel. An average scuba tank holds a standard 80 cubic feet of air, compressed to 3,000 pounds per square inch. It can last a diver anywhere from 45 to 60 minutes at an average depth of 40 feet.

Contrary to popular belief, the tanks are not filled with pure oxygen. Rather, they contain a mixture of oxygen, nitrogen, argon, carbon dioxide, helium, and neon, which are prevalent in the Earth’s atmosphere. Nitrogen is the majority at 78 percent, oxygen comes in second at 21 percent, and the remainder is a mixture of other gases.

There are tanks with hybrid mixtures used by professional divers who intend on staying longer underwater or to compensate for the high pressure at depth. A good example is a nitrox cylinder, which has a higher concentration of oxygen, up to 40 percent, allowing more oxygen into the bloodstream.

Author: Dawn Johnson of San Antonio

A well-regarded entrepreneur and corporate consultant, Dawn Johnson leverages more than 20 years of experience as a high-level executive toward her role in helping CEOs and senior managers to implement business strategies for reorganization and growth. As the founder and CEO of DMJ Consulting in San Antonio, Texas, Ms. Johnson previously served as Executive Vice President and Chief Marketing Officer of the United States Automobile Association (USAA). She led the Fortune 200 company to achieve a nearly 95 percent customer satisfaction rating while simultaneously encouraging growth and development across all divisions. Dawn Johnson utilizes a wide range of abilities that extend across several different elements of business. Earning her Bachelor’s degree in Journalism and Mass Communications from Kansas State University in 1984, Dawn Johnson joined USAA’s marketing team soon afterward. She spent nearly 15 years with the company’s marketing division, where she oversaw development and integration of marketing plans for the USAA Real Estate Company and the La Cantera Development Company. Working in several managerial roles within the department, Ms. Johnson advanced to President and CEO of USAA’s Financial Planning Services (FPS) unit in 2001. During her two-year tenure, she focused on implementing strategic development and rebranding initiatives aimed at better positioning FPS in the market and changing the company’s public appearance from that of strictly an insurance agency to a comprehensive financial services and products firm. With her turnaround strategies at FPS considered a success, Dawn Johnson advanced to President and CEO of USAA’s Alliance Services division in 2003. Ms. Johnson spearheaded negotiations with USAA’s Alliance partners, ultimately leading to the creation of more product and service discount opportunities for customers and a growth in client satisfaction levels. In 2004, Dawn Johnson was appointed Executive Vice President and Chief Marketing Officer of USAA. As the primary marketing executive at USAA, Ms. Johnson expanded her skill set even further by developing and growing the company’s retention programs and creating stronger collaboration between the marketing and operations teams. Residing in San Antonio, Texas, Dawn Johnson maintains an active lifestyle by reading, hiking, scuba diving, and working out in her leisure time. A travel and wine enthusiast, Ms. Johnson enjoys combining both interests during her vacations.

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