Archive for the ‘cave dive training’ Tag

Congrats to new Full Cave Instructor Garry Dallas!

So after 7 days of intense training and evaluation we at Sirius Diving would like to congratulate Garry Dallas from Simply Sidemount & Simply Tec for successfully completing his TDI Full Cave Instructor Course and lots of thanks to Tom Steiner from Gozo Technical Diving for doing a great job in preparing him for it. Well done Sir and well earned.

His comment after the course: ” I’ve passed my full cave instructor course with TDI !!! 🙂
It’s been an intensive but amazing few weeks.
I would like to thank Kris Harrison from Sirius Diving for putting his heart and soul into the course from start to finish. His meticulous attention to every aspect of technical detail is reassuringly satisfying. This is what every instructor should do no matter what level, peoples’ lives depend on you. I’ve thoroughly enjoyed your training. Thank you 🙂
Tom Steiner you have been there all the way for me. Your teaching and guidance has been very influential above and beyond the standard course. I thank you for that too 🙂
I have been privileged to be taught by some of the best instructors to date and I intend to pass their knowledge and experience on to others to make diving as safe as possible.
Feeling humbled, relieved but yet marginally ecstatic to have attained this goal, although not quite sunk in yet.

Cave video shoot for Hollis dive gear at cenote ‘El Toh’

Today Katy Fraser (She Dives Tech) and Marielle Pronk (Sirius Diving) teamed up to shoot a cave video for the dive equipment manufacturer Hollis. For our models we choose Markus Teupe (Planet Scuba Mexico) and Kris Harrison (Sirius Diving). Not just for their good looks but also for the logistics and their leadership, professionalism, partnership and experience. 😉

Cave diving video shoot in Mexico for Hollis equipment.

Kris Harrison and Markus Teupe making a jump in cenote ‘El Toh’, Mexico.

Katy took this great photo in a ‘little’ cave called ‘El Toh’. We picked this cave because it’s a beautiful white cave with room to move for all of us and our cameras and lights but not so big that the cave would swallow all of our lights.

Filming in a cave environment takes planning, precision, a group of experienced cave divers and the more lights the better!

video shoot in the Mexican caves, cave diving.

Dive planning and preparation for a video shoot.

I had a lot of fun today and we already quickly browsed through our footage and it looks like we have some great shots in there.
Now it’s up to Katy to edit the whole thing in a few minute promotion video.

Great team effort today!

Next time we dive together I would love to try and take some good photos 🙂


The keys to life. From a Cave Divers perspective

The keys to life. From a Cave Divers perspective

1. Get control of your breathing
2. Get control of your buoyancy or physical person
3. Think about the solution don’t focus on the problem
4. Act in a calm, controlled and precise manner
5. Do not react based on your emotions; fear and anger = fight or flight

-Fear leads to panic, and a panicked mind is a non-functional mind.

-Anger leads to an adrenaline response and consumes all your energy or the ATP in your cells which consumes the Oxygen in your blood leaving your brain starving and once again non-functional.

Take time, breathe and think before acting in a calm and rational manner..

Imagine if the whole world did this..


Kris is a new guest writer at

Kris will be contributing editorial content and he will also be the new rebreather go-to guy.

Check out his profile

And his first article


Caves, Rebreather and Trimix

A little while ago now we happily returned back home to Mexico. After teaching a month in the caves in Thailand it was great to be diving in the Yucatan again. The cave diving Walhalla, Mecca, Paradise, or whatever you want to call it. There simply is more cave here than anywhere in the world combined. Diving just one single cave system here offers more variety and teaching possibilities than all the different caves together in Thailand. Like Kris says; ‘teaching cave in Thailand also uses a rule of third. Compared to Mexico it takes a third longer, costs a third more and the teaching quality I’m able to give is a third less…’
We enjoyed the Thai curries and change of (beautiful!) scenery immensely but after a month it was time to return to our cave heaven.

We returned to a very quiet Playa del Carmen. Hurricane season = low season = time for some great diving for ourselves! This also means that diving instructors like myself have time to be a student again and improve our diving skills and certifications.

I finished my Megalodon Rebreather MOD 1 course this week with Kris. Next week we will take it a little deeper as we continue with MOD 2.
I was always a little apprehensive of learning to dive on the machine. I must say it is a great experience! It is a really interesting and cool thing to learn and I’m very happy I finally had the time to do it. I added some pictures of us above the water below, unfortunately we didn’t have an underwater camera with us.

Diving instructor, cave diver and colleague Geraldine started her deeper Technical adventure with TDI and Kris Harrison. She is now a Normoxic Trimix diver. Congratulations, dive safe and have fun with it!!

Two more open water instructors working and living in the area decided to spend their days off learning to dive in caves. Russell and Louise started their TDI Full cave courses 3 weeks ago and finished very successfully 9 days later. Great job guys!! Now go and enjoy the beautiful caves. But first Russell will be going a bit deeper; he started his TDI Trimix course today.

They will probably be diving in the Laguna (near Tulum), The Pit (a deep cenote), and we also have a little road trip planned to Bacalar in the south, where we will dive Cenote Azul, followed by a great fish ceviche!

Caves, Rebreather and Trimix diving. What about diving on a Rebreather in a Cave using Trimix?!

Great Diving 🙂


Dry land skill practice for cave dive training in Mexico

Hose control with Sirius Diving

Hose control

Using a simple rope is a great way to practice and to understand hose control before entering the water.

Team communication

Setting up complex navigation

Setting up and navigating past complex navigation is a vital skill for a cave diver.

Team positioning and communication within the team are underestimated skills. It makes your cave dive safer, more efficient and enjoyable.

Lost line procedures

Dry land training is a great way to practice and improve your skills.

Zero visibility exit

Zero visibility line drills

Under water caves are the darkest places on earth and therefor cave divers need to train and be confident to do everything in complete darkness, in case of complete light failure.

Air sharing skill

Cave trim