David Polley B.Sc.

 

Technical, Trimix, Cave & Wreck Instructor and Instructor Trainer

David has over 10 years experience as a dive instructor teaching in a wide range of aquatic environments. Dave began his professional dive career in the UK as a dive instructor whilst studying for his degree in Environmental Biology at University of Bath.

He joined Tech Diving Thailand in 2011 and now manages the Tech Diving Thailand Technical Department.

David leads the Tech Diving Thailand technical facility ensuring high standards are maintained across all technical operations. David is responsible for all

technical programs at Tech Diving Thailand from CCR to advanced trimix courses and technical instructor courses. He also runs regular cave

diving trips, teaching TDI Intro to Cave and TDI Full cave diving courses and leading experienced cave divers into the many deep caves

found on the mainland such as Song Hong and Sra Keaw. Most of these caves require CCR trimix dives with lenthy decompresion. David

runs TDI and PADI TecRec programs and has written some PADI TecRec diving courses such as Advanced Wreck and Cave diver. He is a

BSAC Advanced Mixed Gas Instructor, BSAC Inspiration CCR instructor and teaches the whole range of BSAC tech courses. David is also a

TDI Instructor teaching closed circuit rebreather, Full cave, advanced nitrox and decompression procedures courses, extended range,

Trimix, TDI sidemount etc

As an experienced CCR Inspiration/Evolution instructor his main interest is in CCR deep wreck expeditions, and exploring the many WWII

wrecks in the Gulf of Thailand and South China Sea. David regularly leads expeditions to dive the many Japanese ‘Maru’ shipwrecks sunk i

n WWII and other wrecks scattering the gulf and searching for new wrecks on deep trimix CCR dives, and found many new shipwrecks

around Thailand. David is also fluent in Thai and as an experienced cave diver and head of the technical expedition team 'S.E.A. Explorers'

he carries out cave exploration expeditions and surveying caves around Thailand, working with Thai officials and universities.

 

Qualifications:

SSI Qualifications

 

Degree Qualifications:

  • B.Sc. (Hons) Environmental Biology

Teaching Qualifications:

  • TDI Instructor Trainer #16933
  • PADI Master Instructor #632725
  • PADI TecRec TEC Deep Instructor
  • PADI TecRec TEC Deep Tri-mix Instructor
  • PADI TecRec TRI-Mix Gas Blender Instructor
  • PADI Technical Sidemount Instructor
  • Advanced Wreck Instructor
  • TDI Poseidon MKVI Instructor
  • TDI Inspiration/Evolution CCR Instructor
  • TDI Full Cave Instructor
  • TDI Advanced Nitrox instructor
  • TDI Deco procedures instructor
  • TDI Extended Range Instructor
  • TDI Sidemount
  • TDI Trimix
  • TDI Service Technician
  • BSAC Advanced Mixed Gas Instructor
  • BSAC Inspiration/Evolution Instructor
  • BSAC Compressor Operator
  • Dry Suit Instructor
  • Emergency Oxygen Provider Instructor
  • Underwater Videographer Instructor
  • Equipment Specialist Instructor
  • Diver Propulsion Vehicle Instructor
  • Underwater Photographer Instructor
  • Project Aware Instructor
  • Emergency First Response (EFR) and Care for Children and AED Instructor

Diving Certifications:

  • Hypoxic Trimix CCR Diver
  • GUE Fundamentals Diver
  • Apeks Service Technician

 

www.techdivingthailand.com

Ivan Karadzic

 

Ivan Karadzic

Owner and Technical Instructor Trainer at Koh Tao Tec Divers

Ivan is a SSI / XR Technical Extended Range Instructor Trainer and Mikko is a TDI SF2 eCCR Air Diluent Decompression Rebreather Instructor (MOD2) as well as a XR Technical Extended Range Instructor.

 

Koh Tao Tec Divers was established in 2006 with one mission: to dive and explore the many historic wrecks in the Gulf of Thailand. Our passion for technical diving is what inspired us in the beginning and it continues to drive us today. Our continued search lead us to the position we have today, Koh Tao's premier destination for technical and sidemount diving. We pride ourselves in superior technical diving and sidemount training and in the long-term relationships we’ve built with our customers. People come back to Koh Tao Tec Divers because they know they’ll find what they’re looking in our relaxed atmosphere - a good challenge and a great time!

Koh Tao Tec Divers was established in 2006, as the technical diving department of Koh Tao Divers by Mikko Paasi and Ivan Karadzic joined the team in 2012. Today Koh Tao Tec Divers is a partnership between Ivan and Mikko, both very passionate technical diving educators. 

Both are extremely passionate divers and are active in both wreck and cave exploration and part of the diving branch of Koh Tao Rescue, Koh Tao's non profit emergency service.

Koh Tao Tec Divers offers quality technical diving, sidemount, wreck, cave and CCR courses as well as technical, sidemount and CCR equipment both retail, rental and service.

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We are located on the southern part of the beautiful Sairee Beach on Koh Tao, Thailand.

Teaching Qualifications:

  • SSI / XR Technical Extended Range Instructor Trainer 
  •  SSI Extended  Range
  • SSI Extended Range Nitrox
  • SSI Extended Range Limited Trimix
  • SSI Advanced Wreck
  • SSI Cavern Diving
  • SSI TXR Advanced Decompression
  • SSI TXR Normoxic Trimix
  • SSI TXR Hypoxic Trimix
  • SSI TXR Technical Wreck
  • SSI TXR Full Cave Diving
  • TDI Instructor Trainer 
  • PADI Master Instructor 
  • PADI TecRec TEC Deep Instructor
  • PADI TecRec TEC Deep Tri-mix Instructor
  • PADI TecRec TRI-Mix Gas Blender Instructor
  • PADI Technical Sidemount Instructor
  • Advanced Wreck Instructor
  • TDI Poseidon MKVI Instructor
  • TDI Inspiration/Evolution CCR Instructor
  • TDI Full Cave Instructor
  • TDI Advanced Nitrox instructor
  • TDI Deco procedures instructor
  • TDI Extended Range Instructor
  • TDI Sidemount
  • TDI Trimix
  • TDI Service Technician
  • Emergency Oxygen Provider Instructor
  • Underwater Videographer Instructor
  • Equipment Specialist Instructor
  • Diver Propulsion Vehicle Instructor
  • Underwater Photographer Instructor
  • Project Aware Instructor
  • Emergency First Response (EFR) and Care for Children and AED Instructor