DEPTH Blog

From the discovery of shipwrecks, to the work of the SEALAB Aquanauts, here you’ll find publications that aim to educate, share experiences that shaped history, and inspire a deeper appreciation for the underwater world and those who explore it.

Encyclopedia of Underwater Investigations, 2nd Edition

INTRODUCTION
The purpose of the Encyclopedia of Underwater Investigation is to remove the mystique from underwater investigative procedures and to supply a clear, descriptive, step-by-step instruction manual for the professional public safety dive team.

While it is approaching summer here in the northern hemisphere, down in Antarctica it is close to winter, where temperatures plummet to -50 degrees and darkness prevails for months. Scientists rarely dive under these conditions, but it has occurred in the past.

NSF Polar Programs Diving Safety Officer prepares for a dive on the Poseidon Se7en rebreather under the ice in Antarctica. Wearing a dry suit with heated undergarments and dry gloves keeps the divers warm (enough) to do their work in the -1.8C water.

Curious to explore the undersea world, Alexander the Great used a glass diving bell to submerge himself below the surface. The fish, it is said, “crowded around him in homage.” In 332 BCE, he ordered soldiers to submerge inside diving bells and destroy the enemy’s underwater defenses.

Scientific divers often work in remote areas, and sometimes far offshore.

John Heine, author of Cold Water Diving: A Guide to Ice Diving, travels to places such as Antarctica (pictured below) to oversee scientific diving through the U.S. Antarctic Program of the National Science Foundation. In the photo belog he is researching the use of rebreathers under the ice, as well as various new strategies to stay warm with the use of active (electric) heated undergarments.

In the below image a scientific diver works in a deep kelp bed in central California.  She is measuring the percent cover of various marine algae as a part of her Master’s thesis.

Have you ever wondered what it looks like under the ice, looking torward the surface...? 

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!