Tech and Training

William Armstrong mugshot composite
Composite created with AI based on mugshot of William Armstrong released by Kaufman County Sheriff's Office

Dive Instructor Arrested in 12-Year-Old Student’s Death

The arrest of dive instructor William Armstrong follows months of scrutiny after the young student died during a certification course in August 2025. As previously reported by X-Ray Magazine, the case raised serious questions about supervision, training standards and the handling of evidence in the aftermath of the accident. At the time, concerns were also voiced about missing dive computer data and the apparent lack of a thorough initial investigation.

Checklists: A Rebreather Safety Strategy

Rebreather diver
Rebreather diver (Photo by Robert Hornung, CC BY 2.0)

In rebreather diving, preparation and checklists are essential for staying alive. So, why do some rebreather divers skip their checklists? Simon Pridmore takes a closer look, offering insights and tips for diving safely in an excerpt from his recent book, Technically Speaking: Talks on Technical Diving, Volume 2: Foundations and Strategies.

Buddy Dive Resort Academy IDC Program

Buddy Dive Resort, one of Bonaire's premier diving destinations, continues to offer its IDC, a comprehensive and internationally recognized program that trains aspiring scuba instructors to the highest professional standards. Held year-round in the idyllic setting of Bonaire, the IDC at Buddy Dive has become the go-to course for divers looking to advance their careers and gain PADI Instructor certification.

Are you an aspiring diver looking to go professional? Buddy Dive academy offers the chance and resources for you to become an instructor.

Dylan Harrison
Dylan Harrison drowned on August 16 while attending a class at The Scuba Ranch in Terrell, Texas

Mystery and Outrage Surround Death of 12-Year-Old Scuba Student

The death of 12-year-old diving student Dylan Harrison during a certification course in Texas has sent shockwaves through the international diving community. While every training fatality is tragic, the circumstances of this case—and the subsequent handling of evidence—have provoked widespread anger and calls for accountability.

Converted! Jacket to Wing BCD

There are pros and cons to using a wing BCD system, as well as the jacket-style BCD. Photo by Andrey Bizyukin.

What are the pros and cons of using a wing BCD system compared to a jacket-style BCD? Simon Pridmore and one of his readers share their views, experience and insights to help you decide which one is best for you.

New guidelines suggest divers can safely spend longer at PO₂ 1.3 atm than previously advised — up to four hours of work and four hours of decompression.
New guidelines suggest divers can safely spend longer at PO₂ 1.3 atm than previously advised — up to four hours of work and four hours of decompression.

New Oxygen Exposure Limits Proposed for Divers

A panel of diving medicine experts has recommended revised exposure limits for central nervous system (CNS) oxygen toxicity when divers breathe an inspired partial pressure of oxygen (PO₂) of 1.3 atmospheres. The changes are based on recent research and field experience, aiming to bring guidelines in line with modern technical and scientific diving practice.

NAUI Worldwide Announces 2025 NAUI International Technical Diving Summit

NAUI Worldwide is proud to extend a global invitation to the international diving community for the 2025 NAUI International Technical Diving Summit (NITDS), hosted by NAUI Affiliate North Florida Cave Training, taking place Friday, October 31 through Thursday, November 6, 2025, in Fort White, Florida.

Discover Florida Cave Diving

For divers worldwide, Florida is more than just shore and boat dives; it’s also home to some of the most legendary freshwater cave systems on the planet.