REBREATHER DIVING

Experience Underwater Silence with the Horizon SCR

Are you ready to explore a new world of diving — one with complete underwater silence, extended dive times, and bubble-free breathing?
The Central Coast Divers Semi-Closed Rebreather (SCR) Level 1 Program is your gateway into the future of diving.

This exciting course provides you with the skills and knowledge to safely plan and conduct semi-closed rebreather dives to 30 metres, using a modern SCR Total Diving System, alongside an equally or more qualified dive buddy. Whether you're looking to upgrade your skills, extend your comfort zone, or take the first step into high-tech diving, this program opens the door.

Why Learn to Dive a Rebreather?

Rebreather diving allows you to:

• Enjoy silent, bubble-free diving

• Experience longer, more relaxed underwater interactions

• Improve your buoyancy and trim with advanced equipment

• Enhance wildlife encounters with minimal disturbance

• Gain access to the next generation of extended-range and technical diving

Learning to dive a Semi-Closed Rebreather is easier than you might think — and incredibly rewarding.

A Premium Training Experience

Our Level One SCR program uses a globally recognised Total Teaching System, blending digital learning, hands-on practice and proven instructional methods.
We ensure your training is safe, fun and exciting, giving you the confidence to use your SCR both recreationally and beyond.

You’ll learn:

• The essential theory and principles of semi-closed rebreather diving

• How to choose and configure your SCR Total Diving System

• How to plan and execute safe, enjoyable, bubble-free dives

• Real-world procedures to maximise the benefits of your SCR

COURSE OUTLINE — LEVEL 1: 3 DAYS

Training Includes:

• Planning and conducting non-decompression dives using a single cylinder to 30 metres

• Diving in environments similar to your training conditions

• Completion of the XR Water Fitness Evaluation

• A minimum of 1 hour of confined-water skill development

• A minimum of 4 open-water training dives

• At least 120 minutes of in-water runtime on the applicable SCR unit

Prerequisites

• Nitrox Diver certification

• Minimum 24 logged dives

Inclusions

• All online and classroom learning

• Pool session and facility costs

• Tanks & weights

• Nitrox fills

• Sorb

• Certification processing

• Required shore and/or boat dives

Exclusions

• Horizon SCR rebreather hire (available at $195/day)

• Transport

Equipment Requirements

• Mares Horizon SCR Rebreather

• Standard XR equipment list (BCD/harness, regs, wetsuit/drysuit, mask, fins, computer, etc.)

A Fun, Challenging & Future-Focused Training Path

The Mares Horizon Level 1 course combines foundational knowledge with real-world, scenario-based training, helping you make smart, informed decisions underwater. Whether you’re looking to expand your diving horizons or preparing for future Extended Range (XR) pathways, this course sets you up for success.

Want to Try a Horizon SCR Before Committing?

Visit our Diamond Training Centre in Killarney Vale for a Horizon SCR Try Dive. It’s the perfect way to experience silent diving for yourself — and discover how quickly you can begin your SCR journey.

SCR REBREATHER DIVING (Level 2)

The Central Coast Divers/SSI Level Two Semi Closed Rebreather Diving program combines all skill and knowledge from Level One plus new deeper dives with limited decompression, providing divers with the required knowledge and training, necessary to independently plan and conduct safe (up to 25 minutes of decompression) diving, using the Mares Horizon semi-closed rebreather (SCR), diving to a maximum depth of 40 metres, using a complete SCR Total Diving System and SCR diving procedures, with an equally or more qualified dive buddy.

Central Coast Divers Rebreather training programs are the perfect way to increase your knowledge and skills, whilst at the same time, learning how to safely use the new semi-closed  rebreather equipment.

Learning to dive with a Semi Closed Rebreather is easier than you may think!

Our rebreather programs use a globally recognised Total Teaching System, which includes digital learning materials and proven instructional techniques, this process ensures you have a safe, fun and exciting learning experience.

You will learn the theory needed to safely dive with an SCR unit, how to select your SCR Total Diving System plus, how to plan safe and fun dives, that maximises the benefits of an SCR.

Level 2: Five days program

This Semi Closed Rebreather program provides the knowledge and experience required; to independently plan and conduct dives to a maximum depth of 40 metres with a maximum of 25 minutes of accelerated decompression, with an equally qualified dive buddy using the Horizon SCR unit, SSI training techniques and SCR extended range skills.

You will complete:

• Academic sessions and Final exam 
• Equipment configuration session
• XR Water Fitness Evaluation 
• XR Rescue
• Complete at least one confined water skill development session with a minimum cumulative time of at least one hour  
• Complete at least six open water training dives 
• Complete at least 420 minutes of in-water runtime on the Mares Horizon SCR unit.

Prerequisites:

• Nitrox Diver certification
• Deep Diver certification 
• Personal Nitrox dive computer
• 24 dives
• Dive planning software

Inclusions:

• All online and classroom learning
• Pool costs,  
• Tanks/weights
• Nitrox fills, Sorb,
• Certification
• Required shore and boat dives

Exclusions:

• Horizon SCR rebreather (may be hired at a rate of $165 per day)
• Transport 
• Meals

Certification:

The SCR Extended Range certification entitles the holder to dive with an equally- or more-qualified buddy, with the equipment configuration used during training and SCR diving procedures, to depths of up to 40 metres with a maximum of 25 minutes decompression, providing that dives are conducted in environments similar to those of the diver’s training and experience.

Rebreather Ocean Try Dive  

Take your Horizon SCR experience to the next level, by completing an ocean dive at a local bay. Once you have completed the Horizon setup, and successfully completed the confined water session, you can opt for an ocean experience.

The Horizon Try SCR ocean experience offers you a "hands on" introductory experience using the Mares Horizon, semi-closed rebreather. 
This is an open water session designed to give participants an introduction into rebreather diving. 

Dive time is a minimum of one hour.
No experience is required and SCR equipment is provided.

The Mares Horizon semi-closed rebreather is the perfect companion for avid photographers and wildlife enthusiasts.
Get up close and personal with marine life; Try SCR Diving today!

Our rebreather programs use a globally-recognised Total Teaching System, which includes digital learning materials and proven instructional techniques.
This process ensures you have a safe, fun and exciting learning experience.

Enjoy a new experience diving with fewer bubbles, improved buoyancy and increased dive time. Simply visit or drop into our Diamond Training Centre, to learn how you can start today!.

The Horizon SCR Rebreather represents a genuine breakthrough in recreational diving technology.

Born from decades of combined expertise between MARES and rEvo, this semi-closed Nitrox rebreather brings professional-grade engineering to divers ready to explore beyond traditional limits.

At its heart lies intelligent electronic technology that maintains a constant, optimised flow of Nitrox gas—eliminating the guesswork and complexity that once defined rebreather diving. This means you spend less time managing equipment and more time experiencing the underwater world with extended bottom times and reduced gas consumption.

Designed with one unwavering principle: simplicity.

The Horizon strips away unnecessary complications, making rebreather diving genuinely accessible for recreational divers. Whether you're taking your first steps into this exciting realm or expanding your diving horizons, this unit welcomes you with intuitive controls and reliable performance.

The exceptional value now available makes this the perfect moment to begin your rebreather journey.

Join the growing community of divers who've discovered how the Horizon transforms their underwater adventures—delivering capability, efficiency, and confidence at a price point that finally makes sense.

NO BUBBLES. AWESOME TRIM.

NOW TRY IT FOR YOURSELF.

Certified diver? Here’s your chance to experience rebreather diving firsthand.

Get underwater with the Mares Horizon Semi-Closed Rebreather in the safe, controlled environment of a swimming pool.

Experience the incredible trim. Feel the difference. Enjoy fewer bubbles. Discover why diving a Horizon is completely different from diving conventional scuba.

BUT YOU NEED TO BOOK — PLACES ARE STRICTLY LIMITED.

Each Try Dive requires individual supervision, which means we can only accommodate a small number of divers per session.

Once the available sessions are booked, that’s it.

DON’T WAIT. DON’T MISS OUT.

You’ve looked at rebreathers.

You’ve wondered what they’re like.

NOW DIVE ONE.

GET IN. GET HORIZONTAL. BREATHE DIFFERENT.

BOOK YOUR MARES HORIZON TRY DIVE NOW

Certified divers only • Strictly limited places • Advance bookings essential

SECURE YOUR SPOT BEFORE SOMEONE ELSE DOES.

WHO CAN JOIN?

This experience is for certified scuba divers.

Please bring:

• Your diver certification card
• Swimmers
• Towel
• And plenty of curiosity!

Mask, fins and wetsuit are provided.

LIMITED POOL SESSIONS — BOOKINGS ESSENTIAL

Rebreather Try Dives require individual attention and supervision, so the number of divers we can accommodate is strictly limited.

If you've ever looked at a rebreather and thought, “I'd love to give that a go…” — this is your opportunity.

Don't stand poolside watching someone else experience it.

GET IN. GEAR UP. BREATHE DIFFERENT.

BOOK YOUR HORIZON REBREATHER TRY DIVE TODAY

Limited places available — reserve your pool session before they're gone.

 i100 Dive Computer

Built for divers who want simplicity, reliability, and essential performance—without unnecessary complexity. Whether you’re just starting your underwater journey or looking for a dependable backup computer, the i100 delivers everything you need to dive safely and confidently.

Designed with versatility in mind, the i100 offers four operating modes—Air, Nitrox, Gauge, and Free Dive—allowing you to tailor your dive experience to your environment and skill level. Seamlessly switch between modes while maintaining accurate tracking, making it ideal for divers who enjoy both scuba and breath-hold diving.

Ease of use is at the core of the i100. Its intuitive one-button navigation system provides quick access to critical dive data, including maximum depth and bottom time from your last dive. Combined with a clear display and straightforward interface, it ensures you stay focused on the dive—not your equipment.

Reliability continues with a user-changeable battery, powered by globally available standard cells you can find at supermarkets or pharmacies. Even better, the i100 retains your settings and dive data during battery changes, so you’re always ready for your next adventure without resetting your system.

Safety is front and centre, with audible alarms and a high-visibility LED warning light to alert you instantly to important dive conditions. Features like an optional deep stop timer, automatic altitude adjustment, and the ability to switch between salt and freshwater settings ensure accurate, adaptable performance wherever you dive.

For enriched air divers, the i100 supports Nitrox mixes up to 100% oxygen, with the ability to program up to two different gas blends—giving you flexibility and extended bottom times when used appropriately.

The water activation feature ensures your computer automatically powers on at the start of your dive, eliminating the risk of forgetting to activate it. After your dive, the History Mode logs up to 24 dives and provides key stats such as total dive hours, maximum depth, and lowest recorded temperature—perfect for tracking your progress over time.

Built to grow with you, the i100 also features user-updatable software, allowing access to future enhancements and ensuring your computer stays current as technology evolves.

Simple, tough, and dependable—the i100 is your go-anywhere dive companion.

i770R Dive Computer

Advanced Air Integration Meets Smart Connectivity

Take complete control of your diving with the i770R Dive Computer, a premium, feature-rich system designed for divers who demand accuracy, visibility, and seamless connectivity. Combining powerful air integration with an ultra-bright display and intuitive operation, the i770R keeps you informed and confident on every dive.

The vibrant TFT colour screen delivers exceptional clarity in all conditions, while the 3-axis full-tilt digital compassensures precise underwater navigation with bearing lock and reciprocal heading. With hoseless air integration and real-time Gas Time Remaining calculations, you’ll always know exactly where you stand with your gas supply.

Stay connected beyond the dive with built-in Bluetooth, allowing you to sync and share your dive data, locations, and memories instantly via the Diver Log+ app on iOS and Android.

Built for performance, safety, and convenience, the i770R Dive Computer is your ultimate dive companion—delivering real-time data, advanced features, and total confidence every time you enter the water.

i770R Dive Computer

Advanced Air Integration Meets Smart Connectivity

Take complete control of your diving with the i770R Dive Computer, a premium, feature-rich system designed for divers who demand accuracy, visibility, and seamless connectivity. Combining powerful air integration with an ultra-bright display and intuitive operation, the i770R keeps you informed and confident on every dive.

The vibrant TFT colour screen delivers exceptional clarity in all conditions, while the 3-axis full-tilt digital compassensures precise underwater navigation with bearing lock and reciprocal heading. With hoseless air integration and real-time Gas Time Remaining calculations, you’ll always know exactly where you stand with your gas supply.

Stay connected beyond the dive with built-in Bluetooth, allowing you to sync and share your dive data, locations, and memories instantly via the Diver Log+ app on iOS and Android.

Built for performance, safety, and convenience, the i770R Dive Computer is your ultimate dive companion—delivering real-time data, advanced features, and total confidence every time you enter the water.

Dive with Confidence

Even When a Buddy Isn’t Available.

There are times when the ocean is calling, but a dive buddy isn’t available. The Independent Diver Specialty Course at Central Coast Divers provides the skills and knowledge required to safely and confidently plan and conduct dives without a designated dive partner.

This program teaches experienced divers how to become self-reliant, responsible, and highly prepared underwater, developing the awareness and redundancy required for safe solo-style diving.

During the course you will learn:

• Advanced dive planning and risk management
• Gas management and redundant air supply systems
• Self-rescue and problem-solving techniques
• Equipment configuration for independent diving
• Situational awareness and dive discipline

This training does not replace buddy diving — instead, it builds a higher level of personal responsibility and capability, making you a stronger and more confident diver in any situation.

Become the diver who is always prepared.

Book your Independent Diver Specialty Course with Central Coast Divers today and take your diving confidence and self-reliance to the next level.

Prepare for Success with Central Coast Divers: Instructor Preparatory Course

At Central Coast Divers, we understand that becoming a scuba instructor is a significant and rewarding step in your professional diving journey. Transitioning from Divemaster or Assistant Instructor to Open Water Instructor requires more than just enthusiasm—it demands a strong foundation in dive theory, skill demonstration, and rescue proficiency.

To ensure you're fully prepared for the challenges of the Instructor Training Course (ITC), we strongly recommend enrolling in our Instructor Preparatory Course (IPC).

This two-day intensive program is specifically designed to:

✅ Strengthen your understanding of advanced dive theory
✅ Refine your in-water demonstration skills to instructor-level standards
✅ Sharpen your rescue and problem-solving techniques
✅ Build your confidence through guided coaching and individual feedback

Led by highly experienced Instructor Trainers, this course offers personalised instruction and practical insight into what examiners expect during the ITC and Instructor Evaluation process. Many successful candidates have credited the Instructor Preparatory Course as the key to their performance and confidence, throughout the instructor program.

Whether you're returning to study after some time or simply want to elevate your readiness, this focused revision will set you apart and ensure you're on solid footing from day one of your instructor training.

Central Coast Divers is committed to your success. Let us help you build the skills and knowledge to thrive as a dive professional.

Enrol now in our Instructor Preparatory Course - Your entire career as a scuba instructor starts with the right preparation.

Intersorb 812

Soda lime is a chemical absorbent. Calcium Hydroxide reacts with the CO₂ in the breathing circuit to form Calcium Carbonate which is retained within the absorber unit.

The quantity and grade of soda lime used will have an effect on how long the soda lime will last within the system.

Divers requiring a long dive duration, Intersorb 812 is available in 8-12 mesh particle size to maximize CO2 capacity, results in a higher CO2 capacity and longer duration compared to larger particle size products

In general, for a given volume of soda lime, a smaller particle size material will last longer than a larger particle size material.

Intersorb® 812 is a conventional soda lime Carbon Dioxide (CO₂) absorbent comprised of short porous strands, containing mainly calcium hydroxide - Ca(OH)₂ – and water. 

20 Kg tub

*Extra delivery charges apply
Also available in 4 Kg tub

Intersorb 812

Soda lime is a chemical absorbent. Calcium Hydroxide reacts with the CO₂ in the breathing circuit to form Calcium Carbonate which is retained within the absorber unit.

The quantity and grade of soda lime used will have an effect on how long the soda lime will last within the system.

Divers requiring a long dive duration, Intersorb 812 is available in 8-12 mesh particle size to maximize CO2 capacity, results in a higher CO2 capacity and longer duration compared to larger particle size products

In general, for a given volume of soda lime, a smaller particle size material will last longer than a larger particle size material.

Intersorb® 812 is a conventional soda lime Carbon Dioxide (CO₂) absorbent comprised of short porous strands, containing mainly calcium hydroxide - Ca(OH)₂ – and water. 

rEvo recommend only Intersorb 812 to be used in the Horizon SCR.  
Available in 4 Kg / 4. 5 Lt tub.
Repacked from bulk.

Also available bulk in 20kg tub.

San-o-sub cylinder manifolds

San-o-Sub 300 Bar HP Isolation Manifold with HP Side connection, is the one you require when you are delving into tek-reational diving, Designed and manufactured in Italy for long life and heavy use, Nitrox cleaned and engineered with high flow characteristics to maximise your regulators performance.

The manifold system comprises of one left and one right hand, San-o-Sub 300 bar DIN modular valves with a separate crossover isolation manifold.

San-o-sub valve manifolds are the most durable on the market, available in three different centre lengths; 150mm, 192mm, 212mm.

The HP valve itself has the deeper 300 bar, female DIN connection with deeper threads to avoid confusion using a low pressure first stages.

Should you use the valves independently, you will need a blanking plug for each valve.

Please always confirm the thread of your tank before ordering.

San-o-sub cylinder manifolds

San-O-Sub 232 Bar Isolation Manifold with Side connection, is the isolation manifold you require, when you are delving into tek-reational diving. Designed and manufactured in Italy for long life and heavy use, Nitrox cleaned and engineered with high flow characteristics to maximise your regulators performance.

The manifold system comprises of one left and one right hand, San-o-Sub 232 bar Hybrid DIN/YOKE modular valves with a separate crossover isolation manifold. 

Should you use the valves independently, you will need a blanking plug for each valve.

Please always confirm the thread of your tank before ordering.

🌊 Become a Trident Dive Club Member Today!

The Trident Dive Club isn’t just a membership — it’s your gateway to unforgettable diving, lifelong friendships, and a thriving community of ocean lovers.

Whether you’re new or seasoned, you’ll find buddies, skills, and adventures that make every dive better. Come along and meet members on our monthly Trident Club boat dives.

✅ Instantly join a supportive dive family — no more solo dives
✅ Find dive buddies fast through our private group
✅ Join regular weekend dives — all levels welcome
✅ Enjoy exclusive local & international dive trips
✅ Attend social nights, talks & workshops
✅ Unlock huge savings on gear, courses & trips

With over 2,000 members (including 195 Elite divers), you’ll never run out of people to dive, travel, and celebrate with.

🚨 Why wait? More dives, more friends, more skills, more fun.

👉 Join the Trident Dive Club today — and dive into the adventure of a lifetime!

Because the ocean is calling — and you don’t want to miss a single moment.

At Central Coast Divers, our Trident Dive Club gives you the chance to choose the membership that fits your lifestyle and passion for diving.

There are four levels of membership to select from — Bronze, Silver, Platinum and Sovereign— and each level opens the door to unique opportunities, benefits, and adventures.

Whether you’re looking for value-packed savings, advanced training, exclusive events, or the prestige of diving with our most experienced community, there’s a level that’s perfect for you.

 BECOME A MEMBER NOW 

Bronze 

• Facebook access to Trident scuba page-
• 5% discount off RRP Gear-
• 5% discount off courses- 
• Hire a scuba pack 4 times and the 5^th hire is FREE  
• Hire 9 tanks get 10th hire tank free- 
• Bi-monthly newsletter.

Silver Membership benefits

• 7.5% discount off RRP Gear- 
• 7.5% discount off recreational dive courses- 
• TEN free air fills or FIVE tank rentals- 
• Hire a scuba pack 4 times and the 5^th hire is FREE-
  
• Hire 9 tanks get 10th hire free- 
• Bi-monthly newsletter-
• Tri colour Club T shirt-
• Free monthly guided shore dives- 
• 5% discount off local getaways
  

Platinum Membership benefits

• 10% discount off RRP Gear- 
• 10% discount off recreational dive courses- 
• One double boat dive 
• 10% Discount off subsequent Boat dives- 
• TEN free air fills or FIVE tank rentals- 
• Hire a scuba pack 4 times and the  5^th hire is FREE-
• Hire 9 tanks and the 10th hire is FREE-
• Tri Colour Club T shirt 
• Bi-monthly newsletter-
• One Free monthly guided shore dives-
• Free Ecology specialty course-
• Six-month gear check
• 6.5% discount off local getaways

Sovereign  

• 25% discount Gear Hire- 
• 15% discount off recreational dive courses-  
• Two double boat dives
• 25% Discount off subsequent Boat dives-
• Ten Nitrox fill card - 
• Hire a scuba pack 4 times and the  5^th hire is FREE-
• Hire 9 tanks and the 10th hire is FREE-
• Embroidered Club Polo Shirt- 
• Free monthly guided shore dives- 
• Skills update in Pool-
• Priority getaway booking-
• Club price on International trips
• Two free ecology courses- 
• Bi-monthly newsletter-
• Free Annual Gear service. (Not parts)- 
• Free six months equipment check
• 8% discount off local getaways

BONUS Benefits As a Platinum or Sovereign MEMBER

• If you LOG 25 dives with Central Coast Divers in your ‘membership year’ you receive a total of 25 loyalty dollars
• If you LOG 50 dives with Central Coast Divers in your ‘membership year’ you receive a total of 50 loyalty dollars
• If you LOG 75 dives with Central Coast Divers in your ‘membership year’ you receive a total of 75 loyalty dollars

Refer a friend program –  

It’s always better to dive with friends!
Simply refer and sign up a friend who completes a Learn to scuba diving course with us, and as a thank-you, you will both receive a complimentary Double Dive.

You can choose Reef adventure, and we will supply all the hire gear you need.
It’s our way of saying thanks for helping grow the Central Coast diving community!

This is a complete scuba hire package that can be purchased when participating on our boat charters.  The kit includes the following items:

• Wetsuit
• BCD
• Primary and Secondary regulators
• Computer