Extended Range Courses

The Nitrox/Enriched Air Diver course is the most popular diver specialty course and the number of extended range and technical divers is on the rise, which means that lots of scuba divers, want enriched air and gas blends. 

The Tec Gas Blender course teaches you to blend enriched air nitrox and helium-blend gases using one or more blending methods.  Being the blender is a key job at our busy Instructor Training Centre and our work allows other divers to do what they love to do.

Become an Extended Range Side mount Diver

The Pro-Dive Extended Range Side Mount course trains you to dive in a side mount configuration, utilising the techniques required to use multiple-stage cylinders, carried for decompression diving efficiently and effectively.

Step Into the Past — And Your Next Level of Diving

Advanced Wreck Diving with Central Coast Divers

The first time you descend into a shipwreck, it can feel like stepping across a threshold into another world. When the ocean claims a vessel — by fate or by design — it seals it in time. Corridors, cabins, and machinery become a silent museum of mysteries and stories waiting to be uncovered.

At Central Coast Divers, we turn that sense of awe into confidence, skill, and safe exploration through our Advanced Wreck Diving Course.

Learn From Decades of Wreck-Diving Experience

Our instructor team brings over 55 years of combined wreck-diving and technical-training expertise, guiding thousands of divers through Australia’s most iconic sites.
You’ll train with seasoned professionals who have explored wrecks throughout the Indo-Pacific and know how to teach safe, controlled penetration techniques — not just theory.

We focus on:

• Proper wreck-diving procedures

• Equipment configuration and redundancy

• Finning techniques for confined spaces

• Guideline handling and exit strategies

• Navigation inside complex structures

Every step is hands-on, controlled, and designed to build real confidence.

Safety First — Always

Wreck diving is one of the most rewarding specialties in scuba, but it demands respect.
We use:

• Small student-to-instructor ratios

• Pre-dive safety briefings

• Redundant gear setups

• Controlled environments and progressive depth limits

• Continuous skill checks and comfort assessments

With Central Coast Divers, your safety is never compromised — and neither is your enjoyment.

More Than a Course — It’s an Adventure

Expect an unforgettable experience:

• Explore real wrecks

• Challenge yourself with new skills

• Build situational awareness

• Discover hidden spaces most divers never see

By the end, you’ll not only be a safer, more capable diver — you’ll have a deeper appreciation for wrecks as time capsules of maritime history.

Your Pathway to Extended Range & Beyond

The Advanced Wreck course is also a perfect gateway into more technical programs, such as:

• SSI Extended Range (XR)

• XR Nitrox & Technical Foundations

• Deep Diving Specialties

• Horizon SCR (Semi-Closed Rebreather)

• Advanced Wreck Penetration

If you’ve ever imagined longer bottom times, deeper dives, or more challenging environments, this course sets the foundation.

Take the Next Step

Whether you’re a curious adventurer or training toward full technical certification, your journey starts here.

Join Central Coast Divers and unlock a new world of exploration — safely, confidently, and with the most experienced wreck-diving instructors on the Central Coast.

Let’s go diving.

XR Nitrox 

This program introduces you to the Extended Range training techniques and skills, that can be completed wearing a standard single-cylinder equipment configuration.

You will earn the SSI Extended Range Nitrox Diving certification after completing this program.

FACTS

Minimum Age: 16

Certification Prerequisites:
Deep Diving certification
Enriched Air Nitrox 40% certification
24 logged Dives

Academic Sessions:
Online training

Open water sessions 
Open Water Dives: Four 
Maximum Training Depth: 40 metres

Materials And Equipment

The minimum required equipment for the Extended Range Nitrox Diving program is: 

• A complete recreational Total Diving System, appropriate for single gas switch, non-accelerated decompression diving.
• One stage cylinder and stage regulator, oxygen cleaned as required. 
  
  OR   
• A complete recreational Sidemount Total Diving System, appropriate for single gas switch, non-accelerated decompression diving.
• One stage cylinder and stage regulator, oxygen cleaned as required.

The SSI Extended Range program forms a bridge between Recreational Diving and Technical Diving. They are designed to allow you, the recreational diver, the chance to enter the exciting world of Extended Range/Technical diving, without necessarily having to dramatically change your existing diving philosophy.

The intent of the Extended Range Foundations program is to provide divers with a workshop environment, to improve their skills to higher levels, using Extended Range Total Diving Systems and procedures.

Technical Extended Range

The intent of the XR Technical Extended Range program is to provide divers with the training necessary to independently plan and conductdives with a  two-gas switch, multiple-stop decompression dives, to depths of up to 60 metres, using specialized diving equipment and procedures with an equally-qualified dive buddy.

You will earn the Technical Extended Range (with or without Trimix) certification after completing this program. 

FACTS

Minimum Age: 18 

Certification Prerequisites:    

• Science of Diving,
• Diver Stress & Rescue,
• Extended Range Foundations
• Extended Range or Full Cave Diving or Technical Wreck Diving
• 70 logged Dives

Academic Sessions:    Online Program with three practical workshops

Pool/Confined Water Sessions:  One

Open Water Dives:     Six

Maximum Training Depth:     Varies

Suggested Duration:   18 hours

Extended Range Open-Circuit Program

The core program that all other extended range / technical diving open-circuit programs build on. Following your Foundations course where you learn the skills associated with extended range diving, this program takes your new skills on an exciting journey to become an accomplished tech diver, using either a side mount or twinset configuration.

This program prepares you to plan and conduct trimix decompression dives to a maximum depth of 45 metres. Open circuit dives are made using Air and Nitrox mixtures, to a maximum depth of 45 metres.

Strong recommendation: Complete Foundations course before commencing program.

Extended Range Instructor Program 

The previous two years have seen a dramatic surge in divers, wanting to attend Extended Range diver programs. This has led to a genuine need for Extended Range Instructors.

Central Coast Divers offer you the opportunity to learn about these exciting programs, where our full-time Instructor Trainers, teach you the foundations of tech diving-

The Extended Range Instructor course aims to provide you with the training, skills and knowledge necessary to teach extended range divers.

Plus, how to plan and conduct tek-reational dives, to a depth of 45 metres. Dives that also include gas switches and multiple-stop decompression, safely.

Once you established this base, you then progress onto Extended Range NITROX diving and Extended Range WRECK diving.

Pre-requisite Instructor courses:  

Deep Dive Instructor
Wreck Dive Instructor
Night Dive Instructor
Enriched Air / Nitrox Instructor

As part of the Extended Range Instructor course, you will also learn how to teach students- how to dive with an equally-qualified dive buddy working together as a team, even though they may be using, different configurations of diving equipment.

Extended Range Instructor programs offered: 

Extended Range Foundations
Extended Range Nitrox
Extended Range Nitrox (Twins)

YOU WILL REQUIRE YOUR OWN XR Total Dive System also available to purchase before your course commences.

Purchase your eXtended Range complete system from CCD,  book your program  and receive a FREE Gas Blender Course

Call 02 4389 3483 to book.

The New Word on the Block: “TEK-REATIONAL”

Step beyond the limits of traditional recreational diving with our Extended Range (XR) Bundle — where advanced training meets next-level adventure.

The purpose of this eXtended Range course bundle is to equip you with the proper techniques and procedures to safely explore dive sites that recreational limits can’t reach — all without exceeding a depth of 40 metres. This is your chance to experience longer bottom times, plan staged decompression, and dive with enriched nitrox blends of up to 50%.

You’ll gain the knowledge, confidence, and qualifications to:

• Dive to 40 metres

• Plan and complete dives with up to 15 minutes of decompression

• Use enriched air nitrox blends up to 50%

• Master technical-style dive planning, gas management, and gear configuration

This is not just about going deeper — it’s about diving smarter, staying longer, and accessing spectacular sites that are out of reach for most recreational divers.

If you're ready to go beyond the ordinary and become part of the new generation of TEK-REATIONAL divers, the XR Master Diver Bundle is your next step.

Train harder. Dive longer. Explore further.

Please Note: The ex HMAS Adelaide is closed till further notice.
Wreck specialty courses will recommence, when the site reopens. 

Introducing the New Word on the Block: “TEK-REATIONAL”

Take your diving to the next level with the XR Master Diver Bundle — the perfect fusion of technical and recreational scuba diving.

This is where adventure meets advanced training. “Tek-reational” diving opens up a whole new underwater world, beyond the limits of standard recreational diving.

With the Extended Range (XR) Master Diver pathway, you'll learn proper diving techniques and dive planning skills that allow you to explore deeper, stay longer, and safely manage staged decompression — training you  past the recreational depth limit to the 45-metre level-

Whether you’re chasing pristine wrecks, extended reef explorations, or just want to evolve your diving capabilities, the XR Master Diver bundle is your gateway to going beyond the ordinary.

Why Go Tek-Reational?

• Push your limits safely, with no need to exceed 40m

• Learn staged decompression and advanced dive planning

• Gain confidence with technical-style gear setups

• Access spectacular sites beyond recreational reach

• Stay down longer, explore further, and rise to the challenge

Technical diving is no longer just for the elite — it's now within reach for every experienced diver ready to step up.

Are you ready to dive smarter, go further, and explore what lies beyond?

Become a TEK-REATIONAL Diver today.

Try it for yourself, book in today!!!

Please Note: The ex HMAS Adelaide is closed till further notice.
Wreck specialty courses will recommence, when the site reopens.