Extended Range Open-Circuit Program

Explore Deeper. Stay Longer. Become an Elite Diver.

Are you ready to push the boundaries of recreational diving?

The SSI Extended Range (XR) Program is designed for passionate divers who want to explore deeper wrecks, dramatic walls, technical environments, and experience underwater adventures beyond the limits of conventional scuba diving.

Whether your goal is extended bottom times, advanced decompression diving, rebreather technology, or becoming a technical diving professional, SSI Extended Range provides the world's most comprehensive pathway into technical diving.

Discover a Whole New World of Diving

Technical diving opens the door to incredible dive sites that few divers ever experience.

With Extended Range training, you'll learn the advanced skills, equipment configurations, and dive planning techniques needed to safely conduct dives beyond recreational limits.

As your confidence and experience grow, you'll progress through increasingly advanced programs designed to expand your capabilities while maintaining the highest safety standards.

The Ultimate Technical Diving Pathway

SSI offers one of the industry's most complete technical diver education systems, allowing you to progress at your own pace.

Choose from world-class programs including:

• Extended Range Foundations

• Extended Range Nitrox

• Extended Range

• Semi-Closed Rebreather (SCR) Diving
  

• Extended Range Sidemount
  

Whether you're interested in deep wrecks, caves, rebreathers, or becoming an XR Instructor, there's an SSI pathway to match your goals.

Why Choose Extended Range?

SSI XR courses are recognised worldwide for combining progressive learning with practical, real-world diving skills.

Throughout your training you'll develop:

• Advanced buoyancy and trim

• Precision propulsion techniques

• Technical gas planning

• Decompression procedures

• Team diving protocols

• Equipment configuration mastery

• Dive planning and risk management

• Emergency response skills

• Confidence in challenging underwater environments

Every course builds on the last, creating highly competent, confident technical divers.

Train Like the Professionals

Extended Range represents the pinnacle of diver education.

These are advanced programs designed for divers who are committed to developing exceptional underwater skills and achieving the highest standards of diving excellence.

Whether your ambition is exploring iconic deep wrecks, undertaking long decompression dives, mastering rebreather technology, or becoming an XR Professional, your journey begins here.

Why Train with Central Coast Divers?

Central Coast Divers is proud to deliver professional SSI Extended Range training using experienced XR instructors, small class sizes, and personalised coaching.

We are committed to helping every diver build confidence through precision, repetition, and practical experience—not simply completing course requirements.

Our focus is producing highly skilled divers who are comfortable, capable, and prepared for real-world technical diving.

Your Extended Range Journey

From your first technical course through to advanced trimix and rebreather diving, SSI provides a structured pathway that allows you to continually expand your knowledge, confidence, and diving opportunities.

Whether you dream of exploring deep shipwrecks, extending your underwater adventures, or becoming a technical diving professional, SSI Extended Range can take you there.

Ready to Go Beyond?

The underwater world doesn't end at recreational diving limits—it only gets more exciting.

Join the growing community of Extended Range divers and discover why SSI XR is recognised as one of the world's leading technical diving training systems.

Contact Central Coast Divers today on (02) 4389 3483 or enrol online to begin your Extended Range adventure. Dive farther. Dive deeper. Go beyond.

Strike Polygon Spear

The Strike Polygon is a spear for spearfishing with a 28mm diameter barrel, including a line-release system made entirely of stainless steel, optimised for loading with thicker bands. 

With a simplified line of fire, 7mm shaft in tempered 17-4 ph steel and Polygon camouflage design.

The Strike Polygon spear has a 28mm diameter barrel, made of extruded anti-corrosive aluminium, that includes a line-release mechanism, made entirely of stainless steel, optimised for loading with thicker bands.

Equipped with a simplified, open line of sight and a 7mm Tahitian shaft made of hardened 17-4PH steel.

The Strike Polygon can accommodate two 14mm circular slings,with an integrated, low-friction shaft guide to give spearfishers the most precise aim possible. Line retainers on the muzzle and handle are low profile, with a simple, clean design. 

To minimise UV reflections which are visible to fish, Mares has created new indigo-coloured circular slings. 

The Strike Polygon spear takes camouflage a step further with a Polygon camouflage design printed on the barrel.

The spear features a new ergonomic handle with a non-slip geometric shape, while the alignment of the barrel to the handle helps absorb recoil while shooting.

The Strike Polygon offers experienced spearfishers the luxury of using an 80mm reel with a micrometric adjustment clutch and 50 metres of 1.7mm diameter line.  

New ergonomic handle in a non-slip geometric shape. The angle of the handle with respect to the barrel is designed to ensure continuity with the user's arm, absorbing recoil

The wide shooting line-retainer can be positioned on either the right or left side of the barrel with retractable sliding safety mechanism.
Reel housing with insert accommodates use with roller muzzles
New polygon camouflage design on the barrel

Available in two different sizes of 90cm and 110cm.

Store Pickup only- No postage

TANA mask

An exclusive set designed for spearfishermen, freedivers and snorkelers looking for low profile masks.

Made of soft, hypoallergenic silicone with a shape that is suitable for any face. 

• Provides an excellent field of vision with reduced eye-lens distance.
• Soft touch inserts on the frame for a sure grip and easy positioning on the face
• Reduced distance from lens to eye field of vision
• Reduced internal volume
• Lightweight 

Side gussets at the nose to facilitate easy equalising 

Combined with Mares' bi-material, flexible Dual snorkel.

Aqua Lung Transmitter BK Rev2

Wireless Precision for Smarter Diving

Upgrade your dive setup with the Aqua Lung Transmitter BK Rev2, delivering reliable hoseless gas pressure monitoring straight to your compatible dive computer. Designed for seamless integration and effortless performance, this transmitter enhances situational awareness and streamlines your dive profile.

🔹 Real-Time Gas Data

Monitor your tank pressure wirelessly with accurate, continuous transmission to compatible Aqua Lung computers including the i450T, i470TC, i750TC, and i770R.

🔹 Secure, Hassle-Free Pairing

Pair once and dive with confidence—your transmitter remains permanently linked, eliminating the risk of accidental cross-pairing with other devices.

🔹 Diver-Friendly Design

• User-changeable battery using readily available replacements
• Compact, durable construction built for demanding dive conditions

🔹 Flexible Nitrox Compatibility

Choose the version that suits your diving:

• Up to 40% Nitrox for recreational diving
• Up to 100% O₂ for advanced and technical applications

Simplify your console, reduce clutter, and gain precise gas monitoring with the Aqua Lung Transmitter BK Rev2— This is a must-have upgrade for streamlined, data-driven diving.

Try Scuba Diving

Your First Breath Underwater Starts Here

Ever wondered what it’s like to breathe underwater?
Curious about the underwater world but not ready to commit to a full course yet?

Our Try Scuba / Try Scuba Diving Program is the perfect introduction to the mesmerising world beneath the surface. Designed as a relaxed, entry-level experience, this program lets you safely sample scuba diving and discover if it’s for you.

With guidance from a professional instructor, you’ll learn the basics of scuba equipment, breathing techniques, and simple underwater skills before enjoying time underwater in a controlled, comfortable environment.

What You’ll Experience

✔ Learn how scuba equipment works
✔ Take your first breaths underwater
✔ Practice basic skills with an instructor
✔ Enjoy a relaxed underwater experience

Choose Your Path

Option 1 – Try Scuba (Pool Session Only)
Experience scuba diving in a confined water environment.

Option 2 – Upgrade to Basic Diver
Learn a few simple skills then add a single open water dive to experience the thrill of ocean diving, without enrolling in a full certification course.

Perfect For

✔ First-time divers
✔ Curious adventurers
✔ Gift experiences
✔ Anyone wanting a taste of scuba diving

Take the Plunge

No long-term commitment. No pressure. Just pure underwater discovery. 

We believe experiencing scuba diving should be enjoyable, rewarding, and stress-free. At Central Coast Divers, our training programs are designed to build your skills, confidence, and comfort in the water at a pace that suits you.

Feeling nervous about mask clearing? You're certainly not alone! Our patient, experienced instructors provide personalised attention through one-to-one or very small-group training, with plenty of time to practise in the safety and comfort of a swimming pool.

There's no pressure, no rushing, and no expectation that you must overcome your fears before you begin. Learning to clear your mask and feel comfortable underwater is all part of the journey. We'll guide you through gradually, helping you turn uncertainty into confidence.

Our philosophy is simple: even in a group, you will learn at your own pace, enjoy every achievement, and discover just how rewarding scuba diving can be.

Book your Try Scuba experience today
Take your first breath underwater and see what you’ve been missing

Limited spots available — jump in register your SSI profile and start your scuba journey now!

TUSA Liberator XTen fins combine cutting-edge engineering with responsive performance to elevate your underwater exploration.

Crafted from advanced, durable materials, these fins feature a specially designed compliant blade that flexes naturally with your leg movements, reducing fatigue during extended dives.

The innovative dynamic stabilisers integrated into the blade surface and rails optimize water flow dynamics, channeling your energy into powerful, efficient propulsion with every kick.

Whether you're navigating challenging currents or enjoying leisurely reef exploration, the Liberator XTen's balanced blend of flexibility and stability keeps you in control.

The sleek, performance-oriented design ensures you'll move through the water with confidence and ease, making these fins an excellent choice for divers seeking both comfort and capability.

The TUSA Ceos mask is a low-profile, low-volume two-window design engineered for divers who demand exceptional comfort and performance underwater.

Available with either a clear or dark skirt to suit your preferences, this mask features TUSA's revolutionary Freedom Technology—a breakthrough innovation that delivers a superior fit tailored to various face shapes and sizes.

The compact profile minimises water displacement and drag, making it ideal for both recreational and technical diving applications.

The dual-window configuration provides excellent peripheral vision while maintaining structural integrity, allowing you to navigate your underwater environment with confidence.

Whether you're exploring the vibrant reefs around the Central Coast or venturing further afield, the Ceos mask combines thoughtful design with proven reliability.

Experience the difference that precision engineering and advanced comfort technology can make in your diving adventures.

Specify clear skirt or black skirt in comments

Stop Guessing Start Navigating

Become a Confident Underwater Navigator.

One of the greatest skills a diver can develop is the ability to navigate confidently underwater. The Underwater Navigation Specialty Course at Central Coast Divers will teach you how to find your way with precision, return to your entry point with ease, and explore dive sites with confidence.

During this program you will learn the essential techniques used by experienced divers, including how to use a compass correctly and how to apply natural navigation methods using underwater features, light, sand patterns and reef structures.

These skills dramatically improve your dive safety, awareness, and confidence, allowing you to spend more time enjoying the dive rather than wondering where you are.

In this course you will learn:

• How to use a dive compass accurately
• Natural navigation techniques used by professionals
• How to estimate distance underwater
• Square and reciprocal navigation patterns
• Techniques to safely return to your exit point

By the end of the course you will be able to plan and execute dives with confidence and precision.

Upon completion, you will earn your Navigation Specialty Certification, a valuable step toward becoming a more capable and experienced diver.

Don’t leave your dive to chance. Take control of your underwater direction.

Book your Navigation Specialty Course with Central Coast Divers today and become the diver everyone wants to follow.

Waterproof Dive Notebook

Plan your dive. Record important information. Communicate underwater.

Whether you're exploring a wreck, completing decompression stops or managing a technical dive, reliable underwater communication is essential.

These durable, reusable underwater wet notes provide a practical way to record information, communicate with your buddy and keep essential dive references close at hand.

Constructed with a rugged 2250D PU-coated ballistic nylon cover, this compact notebook is designed to withstand the demands of recreational and technical diving.

Key Features

• Heavy-Duty Construction: Durable 2250D PU-coated ballistic nylon cover for excellent resistance to wear and abrasion.

• 23 Reusable Waterproof Pages: Replaceable plastic writing sheets allow you to record and erase information dive after dive.

• Six Reference Tables: Conveniently included for quick underwater reference.

• Multiple Storage Pockets: Clear-window pockets with Velcro closures provide easy access to dive tables, checklists, compass information and other important references.

• Pencil Storage: Elastic pencil holders keep your writing equipment secure and accessible. Includes a graphite pencil.

• Quick-Reference Bookmark: Elastic bookmark allows you to mark important pages for immediate access.

• Secure Closure: Elastic closure loop keeps your notebook neatly closed.

• Bolt Snap Attachment: Elastic shock cord provides a convenient attachment point for securing your notebook to your diving equipment.

• SSI Cue Card Compatible: Designed to accommodate SSI training cue cards.

Essential Equipment for Every Serious Diver

From recording dive information to communicating important instructions underwater, wet notes are an invaluable addition to your dive equipment.

They're particularly useful for technical diving, decompression procedures, wreck exploration, dive training and situations where clear communication is essential.

Keep your dive plans, reference information and underwater communication organised in one convenient location.

Ready for Your Next Dive?

Add these versatile underwater wet notes to your dive kit and enjoy the convenience of having essential information at your fingertips.

Order yours today from Central Coast Divers and dive prepared!

San-O-Sub T profile Cross Flow valve 

SCUBA cylinder valves are used to seal high pressure gas in scuba cylinders.

The San-O-Sub T profile, Cross Flow valve is specifically designed to keep the cylinders low profile and accessible.
Primarily used as Rebreather cylinder valves, where it is important to maintain compactness and low profile, with easy  accessibility to the hand wheel.

The valve has a standard 3/4-inch x 14 NPSM parallel thread to fit the cylinder neck thread with a burst disc service pressure of 240 and 300 bar.
Fits most Australian Standard aluminium and steel scuba cylinders.

Constructed of chrome-plated aircraft brass with Oxygen service components this inline valve can be used on either the Diluent and/or Oxygen cylinder.

Only qualified scuba technicians should instal this device onto your scuba cylinder. 

Should there be any doubt this is the correct valve or correct thread for your scuba cylinder, please call or email for more information.

High Pressure Tank valve

SCUBA cylinder valves are used to seal high pressure gas in scuba cylinders. This dedicated 300 bar DIN outlet allows use of DIN first stages regulators only.

High Pressure tank valves are precision machined from high tensile marine grade brass and chrome plated for years of service and corrosion free operation in salt water.

Easy grip soft rubber hand wheel with stainless steel insert ensures long life and large ribs make turning the handle easy, even when wearing gloves. The high-pressure seat is nylon

Valve is equipped with a burst disc and 3/4" x 14 NPSM inlet threads which fit most aluminium and modern steel cylinders used in Australia.

This the valve of choice for the serious diver.

Only qualified scuba technicians should instal this device onto your scuba cylinder. 

Should there be any doubt this is the correct valve or correct thread for your scuba cylinder, please call or email for more information.

232 Bar DIN/K Modular Manifold Valve, without blanking plug

Manufactured by San-o-Sub from the finest marine grade brass, chrome plated to ensure greater corrosion protection- This valve handle design also ensures excellent grip when opening and closing the cylinder.

232 Bar manifold valve can be used with a San-O-Sub manifold bar, or can be used as a stand alone valve for side mount or stage tank, with the use of a blanking plug.

This Hybrid manifold valve can be used with DIN or Yoke regulators.
It comes with a threaded insert which can be removed with an Allan hex key to use this valve with DIN First stage regulators.
When installed, the valve can be used with 232 bar Yoke first stage regulators.

This valve is typically used together with the opposite matching 232 Bar- Side Manifold Valve, plus a San-o-Sub Manifold Centre Isolation Cross Bar creating a complete Isolation Manifold setup for twin 232 bar cylinders.

When a Manifold Valve is used with a matching blanking plug, it effectively converts this valve into a side-mount valve.

The valve has a standard 3/4-inch X 14 NPSM parallel thread to fit the cylinder neck threads of most Australian Standard aluminium and steel cylinders.

Presure Rated to 232 BAR.

Only qualified scuba technicians should instal this device onto your scuba cylinder. 

Standard San-o-sub valves fitted to Faber Cylinders

SCUBA cylinder valves are used to seal high pressure gas in scuba cylinders.
Hybrid valves complete with YOKE insert.
Remove insert for DIN fitting regulator first stages.
Able to accept both yoke or DIN regulators via removable insert.
Presure Rated to 232 BAR.

Only qualified scuba technicians should instal this device onto your scuba cylinder. 

Should there be any doubt this is the correct valve or correct thread for your scuba cylinder, please call or email for more information.

X-One fins and Bonito mask set

Pearl combo is perfect for medium to small faces and offers hours of comfortable, leak-free usage.

Marlin Mask 

• Bright and fun new colours
• Low volume mask with hypoallergenic silicone skirt for watertight seal and hours of comfortable use
• Easy to adjust buckles directly on mask skirt
• Wide lens in tempered glass offers nearly 180° vision

Snorkel 

• Stylish snorkel with splash top
• Includes easy exhale purge valve and soft silicone mouthpiece

Volo Fins 

• Buckle-free strap design
• Riddled foot pocket avoids parachute effect
• Travel friendly short blade
• Channel thrust technology