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Rescue, Wrecks, and Reflection: My Final Month at DAN

I, Anna Krylova, test out doubles at Fantasy Lake above a submerged wreck.

If June was about introductions and July was about diving into research and training, August was about pulling it all together. It was my final month as a DAN/OWUSS intern, but instead of winding down, the pace only picked up — blending public speaking, new certifications, and some unforgettable dives with the steady hum of office projects that carried through to the end.

From left: Tyler Horton (Research Intern), Sam Nosalek (Research Intern), Shannon Hunt (Safety Services, event MC), and me (Anna Krylova, Outreach Intern) pose with the DAN Instagram cutout before the Public Lecture Series.

We kicked off the month with the DAN Public Lecture Series, where the interns were featured as “future dive leaders.” Tyler and Sam shared their research projects from the summer, while I highlighted the fieldwork, training, and outreach opportunities we had all taken part in. Preparing for this event gave me a chance to reflect on just how much ground we had covered since June and to practice presenting those experiences to a community audience. It was also a great moment to reconnect with local divers and represent DAN from a student perspective. 

Tyler Horton and I with our first sets of doubles, gearing up to test them out.

Training remained a theme all the way through August. In my second-to-last week, I completed my Rescue Diver course, something I had been looking forward to since the start of the internship. The course was demanding but rewarding, combining classroom scenarios with in-water problem solving. Working through situations like unresponsive divers, suspected strokes, or managing panicked swimmers helped me link my earlier AAUS training with DAN’s emphasis on real-world emergency management. Taken together with the Diving First Aid course in July, I left feeling far more confident in both anticipating and responding to dive-related emergencies.

I also had the chance to dip my toes into technical diving, experimenting with doubles and pony bottles. We had originally planned to complete an Intro to Tech course, but time slipped away toward the end of the summer. Even so, getting to handle new configurations, adjust to the extra weight, and think through redundancy systems gave me a first look at the different mindset technical diving requires. It was a great way to fan my interest and leave me wanting to come back to tech when the opportunity arises. 

August gave me two very different but equally memorable diving opportunities. The first was the chance to dive in a Mark V helmet, made possible by Craig Nelson and his wife Kelly Kutzer. The helmet and suit, once standard equipment through most of the twentieth century, were far heavier and more restrictive than any gear I had used before. It was fun to dive into the history and scramble around the quarry. The second was a trip to the North Carolina coast, where we visited sites like the Meg Ledge and Liberty Wreck. Fossilized shark teeth, the outlines of old wreckage, and the steady presence of sand tiger sharks made it a dive that felt both adventurous and rooted in place. 

Left: Posing with the DAN flag while seated in a Mark V helmet diving rig. 
Center: Tyler Horton snaps a selfie with me in the background suited up in the Mark V. 
Right: Tyler tests out a shallow-water diving helmet, complete with inflated sleeves (not how it normally goes).
Left: An oyster toadfish tucked into coral.
Center: A sand tiger shark glides past on the wreck.
Right: Water-worn columns from the wreck, with schools of fish weaving through.
Tyler Horton and Ai Ren select oversized animal balloons for our farewell gift to DAN staff.

Back in the office, I continued work on the DAN Store project, which I had started in July. What began as a sprawling spreadsheet of product listings ended in August as consolidated kit descriptions, product copy drafts, and updated compliance notes. It has been a fun chance to put my analytical and data management skills to work in a novel field. But of course, we interns couldn’t leave without a parting gift for our mentors, so we delivered some non-breathable helium in the form of oversized animal balloons.

As the month ended, I found myself reflecting less on the fact that it was the conclusion of my internship and more on how much had been built over its course. From hands-on training to communication projects and field experiences, it was a summer that drew together many skills and interests, and it leaves me looking forward to carrying that momentum into what comes next.

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Building Depth: Research, Training, and Fieldwork at DAN

DAN 2025 Summer Interns at American Quarry. From left: myself (Anna Krylova), Sam Nosalek, Tyler Horton, and Ai Ren.
Tyler Horton (left) and Sam Nosalek (right) do handstands on a platform during our 3-minute safety stop.

The second half of my summer with Divers Alert Network has been as fast-paced and rewarding as the first. Between new dives, field research training, and bigger communications projects, every week has added a new layer to what I’ve learned here. But this month has really pulled me deeper into DAN’s research operations, giving me a closer look at how science, safety, and storytelling work together.

We kicked off July with the addition of our new summer intern, Ai, visiting us from Italy. Ai joined us for a dive at American Quarry during a treasure hunt event hosted by the Piedmont Diving Rescue Association, or PDRA, the local community that maintains many of North Carolina’s quarries. The event mixed community fun with underwater exploration, and it was the first time our full team got in the water together. One of the more surreal moments was attempting to jump on a submerged trampoline — something that turned out to be equal parts funny, weird, and technically difficult. It was the first time all four interns — Sam, Tyler, Ai, and myself — dove together, and it was a great way to celebrate how diving bonds people across backgrounds and experience levels.

Left: Tyler, Sam, and Ai navigate at American, selecting the proper line to guide to the next sunken object. Right: Ai poses with a fake bone underwater.

Back in the office, projects picked up speed. My article summarizing findings from the lung squeeze survey was published, and I began work on a larger project: helping to revamp the DAN Store’s website offerings. That began with building a massive Excel sheet to catalog every product and its specifications. The goal was to update the copy, or product writing, to ensure it was clear, accurate, and consistent across categories. It was less glamorous than diving, but it gave me a better appreciation for how communication and precision feed directly into DAN’s mission.

I also spent time in the media studio, getting to see the DANcast podcast setup and sit in on an episode recording. Having previously only worked on transcripts, watching the full production gave me new insight into how these conversations come to life. I recommend watching out for the upcoming CME episodes — they stand out for their practical takeaways, candid stories, and humor that reveals a different side of dive medicine. 

Kirk Krack (left) is interviewed by DAN’s Director of Communications, Brian Harper, on the set of the DANcast in Durham, NC.
Jayne teaches me how to perform a 4-chamber ultrasound view of a heart on a lab member, while Frauke and others look on.

The most concentrated training this month came with the Field Research Operator Workshop, led by DAN’s VP of Research, Dr. Frauke Tillmans. Over three days, Frauke guided us through the logistics of conducting dive research on human subjects. We practiced taking a four-chamber ultrasound view of the heart to check for bubbles in both venous and arterial chambers, collected hydration data through urine osmolality testing, and learned how to conduct 24-hour dietary recalls and anthropometric measurements. These sessions, paired with presentations from Frauke and collaborators, gave me a much deeper appreciation for the complexity of running human research safely and systematically.

On the final day of the workshop, we brought everything together during a mock run of DAN’s recent VGE (venous gas emboli) study at Mystery Lake. I rotated between roles: documenting the study as the communications intern, collecting physiological measurements as a researcher, and even serving as a participant by joining a 100-foot dive. It was a rare chance to see every side of a project — preparation, data collection, and the diver’s perspective — all in one day. Afterward, we rounded out the weekend with fun dives, exploring some of the quarry’s sunken attractions.

Left: Participant diver swims through kicked-up silt in a school bus.
Center: Possibly a Bluegill fish swims in the shallows at Mystery Lake. 
Right: Fellow intern Tyler Horton runs through the mock trial, performing an ultrasound on the interval mark.
In the DFA Course, Tyler and Ai practice providing CPR and administering oxygen to a mannequin.

The month closed with the Diving First Aid (DFA) course. I had first taken this training two years ago during my scientific diving certification and was struck by how in-depth, extensive, and specific to marine sports it was. I appreciated being in a course that encouraged questions and directly addressed the realities of my work — as a former sailing instructor, my main concern with CPR was always drowning, which wasn’t covered well in standard classes. Renewing my certifications with the very organization that wrote the book on diving first aid was not only a valuable refresher but also an opportunity to give feedback as a student. 

Altogether, July brought a shift from settling in to truly engaging with DAN’s research and training, and it left me better prepared — both in and out of the water — for the final month ahead. And while I hope future fieldwork involves fewer unexpected bat encounters, at least I can say I’m now well-versed in both dive medicine and rabies protocol.

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Diving Into Summer: My First Month as a DAN Intern

At Mystery Lake before a shakeout dive with another intern Tyler Horton (Left), VP of Research, Frauke Tillmans (Middle), and myself (Right).

My first month as a summer intern with Divers Alert Network (DAN) has flown by in a blur of training, new responsibilities, and creative challenges. From safety certifications to writing for public audiences, every week has offered a different way to grow.

Coming from a scientific and field-based background, switching into a marketing and communications role has been both fun and eye-opening. It’s been a welcome challenge to flex new muscles, learning how to package complex information, connect with a broad audience, and support DAN’s mission in a whole new way. 

We began with department introductions and initial assignments, and I quickly found myself involved in a range of ongoing projects. One early surprise was just how expansive DAN’s scope is. Like many divers, I was familiar with the membership and the accident insurance but often conflated the two. It was eye-opening to realize just how comprehensive the organization’s offerings are. Working on a professional liability press release gave me the chance to dive into the fine print of DAN’s insurance products and better understand the differences between coverage types, what’s included, and what’s not.

Alongside that, I’ve been helping shape outgoing communication by drafting newsletter language, contributing to blog posts, and developing content for social media. One of my favorite projects so far was drafting a blog post summarizing findings from a recent research paper on lung squeeze in freedivers. It was a rewarding opportunity to draw on my scientific background and translate the key takeaways into something more accessible for a general diving audience. I’ve also been assisting with marketing giveaways and product photography — specifically, capturing images of the oxygen safety slate. Coming from a wildlife photography and photojournalism background, this was a fun shift into studio photography. Learning how to set curves and shape light with strobes has helped me build new skills I’ve never had the chance to explore before.

It hasn’t been all work, though. We’ve had the chance to do a few shakeout dives in local quarries and tour some key locations. Visiting Duke’s hyperbaric chamber facility helped me better understand how treatment chambers operate and are used for both dive-related and non-dive-related conditions. A visit to the Thunderbird cylinder factory gave us a look at how aluminum cylinders are actually manufactured.  

DAN Interns and some staff visiting the hyperbaric chamber at Duke University.
Anna Krylova/Myself applying a visual inspection sticker on a tank after the PSI/PCI course.
Duke Hyperbaric Technologist Eric Schinazi teaching about hyperbaric chamber Golf during a tour.

Training and professional development have also been a key part of this experience. I recently completed the Visual Cylinder Inspection course through PSI/PCI, which gave me a deep appreciation for the standards behind cylinder safety. I’ve begun the Intro to Technical Diving program and will be starting DAN’s First Aid for Diving Professionals (DFA Pro) certification soon. As the internship reaches its halfway point, I’m grateful for how much I’ve learned already.

Sunset after shakeout dive at Mystery Quarry.
Another beautiful quarry picture at Bluestone during a surface interval.

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