In this episode of Tech Diving On Air, host Tamara sits down with Bernardo Rotzinger, the operational heart of Cuzel and the man ChatGPT has officially dubbed "The Valve Wizard."

In this New Year’s episode of Tech Diving On Air, host Tamara shares three practical tips to help you achieve your goals — from using visualization to make them real and attainable, to understanding the resources your dreams require, and intentionally making time to pursue them.

Tamara also looks back on the biggest highlights of 2025: launching this very podcast (800 listens, 160 subscribers, 6 episodes!), traveling to Diving Talks Portugal to connect with explorers and creators, committing to a meaningful fitness journey, continuing the Vanilla Farm exploration project with Jack Cleary into its second year, growing a small cave-diving business with the support of students and friends, and completing GUE Fundamentals with Ivo from Third Dimension — a challenging, eye-opening class that helped debunk myths about GUE culture, highlighted flexibility in training, and deepened her understanding of procedures shaped by GUE methodology.

She also reflects on the year’s biggest challenges — adapting long-built muscle memory, managing mental and physical fatigue after months of teaching, and being pushed (in a good way!) by GUE’s outstanding and detailed e-learning platform.

Just when she thought the year was over… a brand-new, last-minute project appeared — and she’s hopping on a plane to join it. Which leads to a bonus fourth tip: recognize opportunity, grab it when it arrives, and do what it takes to learn from it.

Happy New Year — and see you in 2026! Thanks for listening.

In this episode of Tech Diving On Air, host Tamara sits down with Dan Sun, entrepreneur, founder, and driving force behind Dan Sun Titanium—a Hong Kong–based company dedicated to creating titanium tools for divers.

Together, they explore how Dan has quietly redefined what high-performance titanium dive tools can be, and the challenges of entering manufacturing without a formal engineering background. Obsessed with precision, Dan operates at the rare intersection of innovative tool manufacturing, rigorous problem-solving, and deep respect for the people who rely on this equipment—divers and explorers who simply don’t have time for failure. While creativity opens the door, functionality always remains the top priority.

In this episode, we discuss:

• How Dan Sun Titanium was born, including the story behind the “perfect” titanium wrench
• Why titanium is the perfect material and her love/hate relationship with titanium
• The realities of manufacturing in the scuba industry: supply chains, production processes, and specialization
• The design rabbit hole—how to evaluate good ideas, understand why some fail, and turn the right ones into reality
• The less glamorous side of entrepreneurship, including the less fun but essential work that leads to excellent customer service
• The production of non-titanium products and the release of a Cenote Girl imited edition item made with Dan Sun especially for exploration. Check it out here!!!

About the guest:
Based in Hong Kong, Dan Sun runs her company while spending much of her time traveling and diving. With a background in corporate HR, she made a complete career pivot after investing in her first production run of 30 titanium spanners—and then taking on the challenge of selling them herself.

A self-taught engineer and entrepreneur, a woman in scuba diving manufacturing, a boat captain, and a rebreather diver, Dan brings a perspective that is both inspiring and refreshingly grounded. Her stories and insights make this episode well worth listening to.

Connect with Dan Sun:

• Website: https://www.dansuntitanium.com/
• Special https://www.dansuntitanium.com/product-page/ocean-tactical-series-explorer-pouch
• Facebook: https://www.facebook.com/dansuntitanium
• LinkedIn: https://www.linkedin.com/company/dan-sun-titanium
• E-mail: info@dansuntitanium.com
  

Sponsor: This episode is brought to you by Seaya Underwater Lighting Systems.

With lights on, we explore more.

https://seaya.com/en/

https://www.facebook.com/seaya.dive.lights

https://www.instagram.com/seaya.dive.lights/

If you enjoyed this episode, please subscribe to the show, leave a review and share it with your dive buddy. Changing the culture starts with a conversation.