/// Technical Diving Indonesia

Welcome to the home of Technical Diving Indonesia


/// Technical Diving Indonesia

technical diving indonesia

PADI tec rec center tdi dive center

Two Fish Tech has been at the forefront of technical diving in Sulawesi and Indonesia, offering technical diving courses and technical dive guiding since 2010. Our main base on Bunaken is both a PADI TecRec center and a TDI dive center dedicated to providing high quality PADI & TDI technical diver training courses, guided technical dives and technical expeditions to all corners of Indonesia.

Two Fish Tech Philosophy

Technical diving has had a reputation of being a niche for ‘big, bald guys’ who completed military-style training. That’s a thing of the past. We strongly believe that becoming a skilled technical diver has nothing to do with physical size or strength but instead with solid training and an emphasis on safety and professionalism. This is what makes a good Tech Diver. “We want our customers to enjoy the challenges of their training and become a better and safer diver overall, whether they are diving to 20 or 60 meters.”

Experienced Instructors

Tech instructor in bunakenYvonne has worked in the diving industry since 2010, starting out as a Divemaster and since 2011 as an instructor. Initially teaching and guiding in Scotland, her work has taken her to Egypt, Bali, Thailand and now Sulawesi. Originally trained in the warm waters around the Great Barrier Reef, Yvonne truly fell in love with the underwater world in the sea lochs of Scotland. In 2014 she moved back to warmer waters and plans on staying here for a while.

Deep walls and wrecks captured her imagination which led to initial tech diver training in the UK in 2011. Since then, Yvonne expanded her experience in Scotland’s Scapa Flow, the Red Sea, the Gulf of Thailand and Indonesia. She currently teaches both TDI and PADI TecRec to 55 and 50 meters respectively, in both backmount and sidemount configuration. In addition, Yvonne teaches Solo Diving. She is also a TDI Cave and Advanced Trimix (100 m) Diver as well as an Advanced Gas Blender.

From our TEC Blog

Sidemount diving – not just for techies!

Jan 25 2016 Yvonne Press
Have you tried Sidemount diving? As our guest Simon discovered this week, sidemount ...

Size really doesn’t matter – meet Bunaken’s smallest tech diver

Jan 13 2016 Yvonne Press
Meet Singaporean Sing Yi. She came to Two Fish Tech in December to dip her toes ...

Big Bunaken hello to Yvonne – and an impromptu Koh Tao reunion

Nov 23 2015 Dom Jeanes
This week we said a big hello to welcome Yvonne to Bunaken – and we’ve ...

Deep Reef at Bunaken

Nov 9 2015 Dom Jeanes
The deep reef at Bunaken is what makes this area an ideal location for technical ...

/// What is TECH?

Broadly speaking, TECH diving can be grouped into Soft-Tech diving and Hard-Tech diving.


Soft-Tech diving is only aimed at recreational divers and includes:

  • Sidemount Diving – having a tank on each side is a lot more stream-lined and comfortable, and the extra gas is ideal for photographers wanting to stay longer as well as those gas-guzzlers. Its also good for those with bad backs because the weight is distributed more evenly and you can easily put-on/take-off your gear in the water
  • Solo Diving – learn how to be self-reliant, perfect for those photographers who like to sit in one place for ages. It can also be combined with Sidemount Diving to give the extra gas!
  • Nitrox Diving – ideal for staying for longer at that ship-wreck, but is also used for added safety and less tiredness
  • Rebreather Diving – fish and underwater life are not scared away when you have no bubbles, so you can get up closer with that camera!

You do not need to be experienced divers for these soft-TECH courses/diving styles, they are for Open Water and Advanced divers who just want to dive a different way.


This is for more experienced divers who want to do more exploration-type and/or deeper diving. Its the Hard-Tech diving that is for those who want to do more exploration-type diving and/or deeper, and includes:

  • Advanced Nitrox and Decompression Diving – using open circuit or rebreathers, this type of diving takes you beyond the recreational limits to 55/60m
  • Trimix Diving – using open circuit or rebreathers, you can add an extra gas to go deeper still, beyond the 75m level
  • Wreck and Cave Diving – using open circuit or rebreathers, with or without trimix, diving in overhead environments where few have been before – a bit like exploring mount everest!

/// Introduction to TECH

We run FREE Intro to TECH at our resorts in Bunaken and Lembeh where guests can try sidemount and twin sets.

Check out this video of a TECH INTRO that we ran at Atlantis Dive Center, Sanur, Bali. Over 2 days, we “introduced” more than 30divers to sidemount diving and Poseiden MK6 rebreathers. Great fun!!

/// TECH Diving in Indonesia

All our locations in Bunaken, Lembeh and Lembongan are great for tec diving.
There are some very good reasons to Tec dive around Bunaken:

  • The dive sites are only 10mins away
  • Walls around Bunaken drop to more than 600m, and visibility is 25m even at 75m+ depth.
  • The water temperature around Bunaken is 29C making for fantastic reef life – Bunaken Island is considered to be one of the most diverse marine environments on the planet.
  • The larger animals such as sharks & mantas like colder water. There are occasional sightings of these animals by our guests, so they are here, however they are found at the deeper levels 55-70m where the water is colder (25C).
  • Coelecanth fish at 90-120m, exploration trips are run regularly
  • We believe that there are also some undiscovered deep-water pinnacles and submerged islands which may offer some fantastic diving, and we will be doing some exploration of the area to find them. We are extremely excited about this as no one has ever done this type of exploration in the area before!

This area is mainly dived as muck diving, and photographers will find sidemount and rebreather diving appealing due to longer bottom times, more gas and great up-close encounters to marine life.

However, Lembeh also has some pinnacles and wrecks to explore. There are also large parts of Lembeh that are unexplored at the deeper depths, and we believe that there are also some undiscovered deep-water pinnacles and submerged islands that offer some fantastic diving.

We do not yet offer Tech diving in Lembongan

Contact us about Tec Diving

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