DEPTH Blog

Today, November 21, is the 100th anniversary of the sinking of the HMHS Britannic, and we are pleased to announce the global launch of Mystery of the Last Olympian: Titanic’s Tragic Sister Britannic by author Richie Kohler with Charlie Hudson!

Can one sea turtle change the world? If anyone can, it's Harry Hawksbill! 

[Article reprinted with permission from Adventure Sports Network, Inc.] 

Paul Mila and his recently released book, Harry Hawksbill Helps His Friends is making a big splash around the Northeast!

Author Jennifer Idol of An American Immersion is literally taking the U.S. by storm. An adventurer, entrepreneur, diver, author, photographer, and graphic designer, this multi-talented woman's message of environmental conservation is spreading across the country. 

MAY 7 (AUSTIN, TEXAS)

It is a very special moment for authors to see their life's work in physical print. To finally hold a print copy of the book is a profound moment for an author.

Jennifer Idol became the first woman to dive 50 states and is Best Publishing Company's newest author. Be among the first to buy her book  and see her transformative quest to show how our national waters are a treasure to care for and protect. 

Join us at Our World Underwater Dive Show in Chicago, IL, for the official book launch of Mystery of the Last Olympian: Titanic's Tragic Sister Britannic by Richie Kohler! 

We have some big news to share . . .

In this article we discuss variation in ocean temperatures and what the colder water diver needs to know. In future articles we will look at rivers, sea ice and fresh water ice.

In this article we discuss lakes as a cold water and ice-diving enviroment. In future articles we will look at oceans, rivers, sea ice and fresh water ice.

The release of the 2015 edition of NFPA 99 earlier this year has been accompanied by a lot of conversation around the subject of hyperbaric facility safety. This week we have three resources that will help you to navigate through the various safety codes and standards.

Today marks the start of the annual two-day spiny lobster sport season in Florida, known as "mini-season," and it got us thinking (about more than just dinner) . . .

Sinus and internal and external ear disorders are the most common side effects of hyperbaric oxygen therapy (HBO2).¹ These spaces are the cranium’s pneumatic sockets and, particularly those of the middle and inner ear, are most frequently involved in the pressure stress caused by compression and decompression maneuvers during exposure to altered pressures in the hyperbaric chamber. Barotrauma is the mechanical tissue damage produced by environmental pressure variation, and the middle ear is the most frequently involved structure in this kind of damage. According to Boyle’s law (the product of pressure and volume is a constant for a given mass of confined gas) it is easy to understand why all enclosed air cavities are more susceptible to this kind of lesion. Barotraumas can occur due to an increase or decrease of gas volume. To avoid gas volume decrease during the compression phase, the patient must perform some compensatory maneuvers aimed at inhaling and forcing gas (air or oxygen) into the nasal and sinus cavities. During decompression in the chamber or even underwater, the body’s gas expands and is expelled from cavities to the outside, usually without any active maneuver. It is essential to teach the patient about the functions of the hyperbaric chamber and the correct maneuvers of baro compensation. In this article, we will describe the main barotraumas that can occur during hyperbaric oxygen therapy.

What do the California Prison Industry Authority (CALPIA), commercial dive training, and the NOAA Diving Manual 5th Edition textbook have in common? We found the answer when we were recently introduced to Fred Johnson of CALPIA by Dan Orr, author of Scuba Diving Safety and former President and CEO of Divers Alert Network.