Technical Diving
Have you explored the recreational depth limits, and are you ready for the next step? Technical diving might be the field you have been looking for.
Technical Diving

Prerequisites
- Be certified as an Open Water diver or above
- Be a minimum of 10 years old (Obtain guardian permission if a minor)
Course Description
This courses trains divers to use the sidemount configuration with two independent cylinders.
The program focuses on proper equipment set-up, gas management and in-water practical skills.
It includes dry workshops, confined-water training as well as open-ocean application dives
This configuration provides versatility and adaptability in different environments and can be used anywhere that will provide you with two independent cylinders.
This course can be taken as a new configuration course or in combination with a range of other courses such as Nitrox, Deep, Advanced Wreck or Technical Decompression courses.
Qualification
This certification allows the diver to execute dives to their maximum certification on Sidemount.
Prerequisites
- Be certified as an Open water or above
- Be a minimum of 15 years old (Obtain guardian permission if a minor)
Course Description
This course provides the necessary skills to safely and efficiently dive using a twinset configuration.
Wether it is used in a recreational setting or for deeper technical diving, twinset diving can increase the volume of gas carried by a diver while providing redundancy.
The program focuses on proper equipment set-up, gas management and in-water practical skills.
This course can be taken as a new configuration course or in combination with a range of other courses such as Nitrox, Nitrox Plus, Deep, Advanced Wreck or a Technical Decompression course.
Qualification
This certification allows the diver to execute dives to their maximum certification on a Twinset configuration
Prerequisites
- Be a minimum of 18 years old
- Be certified as an Open water and Deep diver
- Be certified as a Nitrox Diver
- Be certified as a Sidemount or Twinset Diver
- Have a minimum of 30 logged hours underwater or 25 dives using open circuit
Course Description
The Decompression Diver course will allow you to explore the world of technical diving with an entry-level decompression program to 40m.
The course is divided into dry workshops, confined water training and open ocean application dives.
You will be trained to use additional equipment and learn new skills needed to complete decompression dives safely. After mastering those skills in the confined-water, they will be applied to dives up to 40m in the open ocean.
Dry workshops focusing on safe dive planning as well as equipment and gas selection will allow you to confidently apply your new skills and dive with a diver of the same or higher qualification
Qualification
The Decompression Diver certification entitles the holder to dive to a maximum depth of 45m with one (1) optimised decompression gas.
Prerequisites
- Be a minimum of 18 years old
- Be certified as an Open water and Deep diver
- Decompression Dive (or equivalent)
- Be certified as a Nitrox Diver
- Be certified as a Sidemount or Twinset Diver
- Have a minimum of 30 logged hours underwater or 25 dives using open circuit
Course Description
The Advanced Decompression Diver course will allow you to explore the world of technical diving with an entry-level decompression program to 50m.
The course is divided into dry workshops, confined water training and open ocean application dives.
You will be trained to use additional equipment and learn new skills needed to complete decompression dives safely. After mastering those skills in the confined-water, they will be applied to dives up to 45m in the open ocean with Trimix.
Dry workshops focusing on safe dive planning as well as equipment and gas selection will allow you to confidently apply your new skills and dive with a diver of the same or higher qualification
Qualification
The Advanced Decompression Diver certification entitles the holder to dive to a maximum depth of 50m with two (2) optimised decompression gas.
Prerequisites
Be a minimum of 18 years old
Course Description
The RAID Gas Blender course is designed to provide students with the knowledge and skills to safely and efficiently blend diving gases.
The course is divided into a classroom theory session and practical hands-on supervised blending training.
Gas blending is a highly sought after skill for any dive professional looking to expand their skill-set and increase their employability in the industry.
This dry course can be taken by divers or non-divers as it doesn’t require any in-water training.
Qualification
This certification enables to safely and efficiently blend diving gases.
Prerequisites
- Be a minimum of 15 years old (Obtain guardian permission if minor)
- Be certified as a Deep diver, but a Nitrox certification is highly recommended
- Have a minimum of 5 hours logged underwater in an open water environment
Course Description
The Advanced Wreck course is designed to provide students with the necessary knowledge and skills to conduct wreck penetration dives safely, within the natural daylight zone to a maximum linear distance of 40m from the surface.
This course will teach you how to use new additional equipment as well as new practical skills necessary to safely dive inside a wreck, through dry guidelines laying workshop, confined water training and open water dives.
Although a challenging course, the Advanced Wreck course will open new opportunities for discovering otherwise limited dive sites and artificial reefs.
Prerequisites
- Be a minimum of 15 years old
- Be certified as an Open Water diver
- Have a minimum of 8 hours logged underwater in an open-water environment
- Be certified on the configuration used during the course
Course Description
The Performance diver course is designed to perfect the foundation skills of any diver, regardless of their certification.
Emphasis is put on buoyancy, trim and propulsion techniques, emergency procedures and managing task loading.
Qualification
This certification allows the diver to conduct dives safely and efficiently within the limits of their core certification and experience while demonstrating mastery of foundational diving skills.
Prerequisites
Course Description
Once you're certified, apply your newly learned skill on some of the deeper technical dive sites here in the Gili islands!
Prerequisites
Course Description
Haven't dived in a while and want to polish up your skills? Come and refresh those skills with us so we can go back to exploring.
Prerequisites
- Be a minimum of 18 years old Be certified as a Nitrox, Deep and Rescue diver
- Have logged 50 hours underwater or 75 dives using open circuit
- Have logged at least 5 hours between 25-40m
- Be certified as a Sidemount or Twinset diver, unless this is combined with the program
- Submit a current Rescue Breathing, CPR training and Oxygen Provider certificates
Course Description
The Deco+Advanced Deco course package is a complete and comprehensive technical program for divers wanting to participate in staged decompression dives to a depth of 50m.
Taken together, those courses will provide you with the extra comfort and confidence in your diving knowledge and practical skill set.
This program is structured to give you the keys to safely plan and execute dives to 50m with a team-mindset.
You will be trained to use a new equipment configuration and learn the practical skills needed to complete multi-level technical dives to 50m while using 2 decompression cylinders.
Qualification
The Decompression Diver certification entitles the holder to dive to a maximum depth of 50m/145ft using air, trimix and nitrox with two (2) optimised decompression gas

Meet Bethany
Bethany became an Ocean Quest Coral Propagation trainer, teaching scuba divers how to propagate and manage coral nurseries to preserve this fragile ecosystem for years to come! Climbing the SSI Pathway, Bethany is now an SSI Ecology speciality Instructor, teaching Marine Ecology, Fish identification, coral identification, turtle ecology, shark ecology and Invertebrate ecology.
With a huge passion for marine life and environmental sustainability, Bethany is on a mission to educate scuba divers on the complexity and importance of marine animals and their ecosystems.

Meet Ovan
Why dive with us?
A Friendly & Certified Team
Our team of certified instructors and guides is passionate about marine conservation and sharing the wonders of the Gili Islands Marine Park with you.
Tailored Courses for Every Level
From beginner courses to professional programs, we tailor each experience to your skill level and interests.
Dive in Comfort & Safety
Our state-of-the-art equipment and well-maintained boats ensure comfort and reliability throughout your dive.
Prime beach front location
Our prime beachfront location offers direct and easy access to dive sites around the Gili Islands.
What is Tech Diving?
Beyond its technical aspects, technical diving is an adventure that unlocks access to rare and uncharted sites, offering an unparalleled experience for marine discovery enthusiasts and those seeking personal challenges.
Why Choose Technical Diving?


Meet Clem, our Technical Diving Instructor
From there, she expanded her teaching range with numerous specialties, alongside regularly leading fun and challenging technical dives. Over the years, she has gained invaluable experience teaching and diving in a wide variety of environments; from the cold, murky waters of the English Channel to the deep wrecks of the Maltese islands, and the vibrant marine life of Oman.
She joined Gili Divers in 2021 where she has taken on the task of growing a dedicated technical diving department. With a focus on personalised training, her main drive is always to create a safe and supportive teaching environment to encourage all divers to progress toward pushing their limits.
With a strong passion for deep diving and mentoring, she aims to empower students by giving them the confidence to achieve their diving goals. As a JJ-CCR Mod2 Mixed Gas diver, she enjoys exploring deep reefs and has a special love for historical wrecks.







Every diver has a different reason to get into technical diving.
Technical diving offers the possibility of going beyond the limits encountered by recreational divers.
Different configurations will allow to carry more breathing gas, while learning procedures for overhead diving will allow for safe wreck penetration and exploration.
For those looking to explore deeper depth for a longer time, decompression courses will teach the safe protocols and emergency scenarios to go beyond the no-deco limit safely and confidently.
It can be, as the equipment is often heavier, and the dives can be long. Good physical fitness is an advantage.
Yes, regular practice is crucial to stay confortable with the equipment and procedures.
If it’s not possible for you dive regularly, we offer a tech refresher program over 2 days. It includes both shallow diving to get back the comfort with the equipment, refresh on the theory and planning and technical diving.
Yes, we offer high quality, regularly serviced technical diving equipment rentals to suit your needs during training.
We also strongly recommend you purchase some of the more personal equipment such as masks, dive computer and exposure protection.
This depends on the course and your current skill level.
Sidemount and Twinset courses typically take 3-4 days, while more advanced decompression courses can take up to a week.
If you like to combine courses like Sidemount and Advanced Wreck or Twinset and Decompression Diver, we can provide personalized schedule proposals upon request.
Like any underwater activity, it carries risks, but these are mitigated through thorough training, careful planning, and the use of redundant equipment.
We offer a range of internationally recognised courses, such as Recreational Sidemount Diving, Twinset Configuration, Advanced Wreck Penetration and Technical Decompression courses, tailored to your goals.
Although we are able to rent any equipment required for the courses we offer, we recommend you purchase as much as possible of your own equipment to be able to configure it to you and provide as much comfort as possible.
Some elements of gear which are strongly recommended you get for yourself are primary and back-up mask, dive computer, appropriate fins and exposure protection.
We are always happy to provide our input to select equipment based on personal requirements and preferences.
Technical diving is a broad term for any diving beyond the scope of single-tank, no-decompression diving.
To start your technical diving journey, we recommend you get in touch with one of our tech instructor, who will be able to discuss with you your current level and explain the path to achieve your objectives.
Technical diving goes beyond the limits set for recreational diving, involving depths greater than 40 meters, mandatory decompression stops and additional equipment and cylinders. It also allows for exploration of different environments such as caves, wrecks and simply greater open ocean depths.






