Even with the best laid dive plans, there are times you encounter conditions beyond your control. The Oceanic Delta 4 is one hot new regulator ready to take on all challengers with improved performance, new features, improved styling, and the new FDX-10 First Stage featuring our exclusive Dry Valve Technology (D.V.T.)  Features include:

• Diver adjustable inhalation effort.  Our Patented Dynamic Adjustment automatically maintains inhalation effort throughout the dive.
• Adjustable Venturi Switch (A.V.S.) for simple Dive/Pre-Dive Adjustment
• Paired with the new FDX-10 Balanced Diaphragm featuring Oceanic's exclusive D.V.T. (Dry Valve Technology) that helps put an end to flooded regulators without sacrificing performance! D.R.T. is a revolutionary regulator technology designed to automatically eliminate moisture and contaminants from entering your first stage even if the dust cap is left off eliminating corrosion of critical internal components, bacteria, internal hose deterioration and damaged gauges and computers. Find out more.
  
  
  "THE MOST INNOVATIVE REGULATOR OF 2005!"
  Scuba Diving Magazine, December 2005
  
  

2005 ScubaLab Tester's Choice "Hooked up to the breathing simulator, the Oceanic Delta 4 delivered Very Good to Excellent performance in all the RMV/depth categories, earning the highest simulator scores of all the regs in this price group. In ocean tests, the reg was also a champion, collecting the highest total ergo score in its price group. In particular, divers liked the swivel and the mouthpiece, and felt both the adjustment knob and dive/pre-dive switch were easy to use, even when wearing gloves." Read the complete article

Patented Dynamic Adjustment
A common objection to adjustable second stages is that divers can't imagine themselves twisting and turning a knob as they descend and ascend through the depths. If inhalation resistance is set near zero at depth, your ascent would require you to manually increase resistance as ambient water pressure is reduced to prevent free-flow. Taking another stride beyond common second stage engineering, Oceanic designed a patented DYNAMIC ADJUSTMENT feature into the heart of the Delta 4. This mechanically balanced valve maintains a preferred breathing resistance throughout the dive. Set it once and the Delta 4 automatically adjusts to make breathing as easy at 100 feet as it is at 30 feet - with no additional manual adjustment.

Adjustable Venturi System (A.V.S.)
The A.V.S. deflector vane found in the Delta 4 diverts the airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation. With the addition of a user Adjustable Venturi System (A.V.S.), in the form of a simple yet ingenious switch, full adjustment control rests in the hands of the diver.

In-Line Swivel
The Delta 4 features an ergonomically designed in-line swivel for ultimate comfort.

Improved Adjustment Mechanisms
Both the Dynamic Adjustment Knob and A.V.S. Switch are designed to be unobtrusive, yet easily manipulated even with the thickest gloves.

Surge Deflector
Our surge protector (the titanium, blue or yellow that you see in the images above) reduces freeflow caused by surge or oncoming current.

Computer optimized design
Oceanic regulators are exclusively designed using the latest 3-D computer modeling techniques. This allows us the ability to model and test performance while still in the early stages of development. The Delta 4's unique deflector vane and housing design diverts airflow from the valve directly to the mouthpiece, producing smooth venturi-assisted inhalation.

Lightweight
The Delta 4's housing is made from an ABS/Polycarbonate composite blend of materials making the Delta 4 both extremely rugged and lightweight (6.7 ounces) and nearly neutrally buoyant underwater, reducing jaw fatigue on extended dives. The extremely ligweight cover ring is machined from a solid piece of aircraft aluminum, and then hard anodized, utilizing a unique process to prevent corrosion.

Patented Orthodontic Mouthpiece
To further reduce jaw fatigue, the Delta 4 features a patented Orthodontic Mouthpiece, designed to accommodate the natural overbite of the human jaw.

Nitrox Compatibility
The Delta 4 is classified as being suitable for use with nitrox breathing gas mixtures containing up to 40% oxygen by volume without the need for special preparation, cleaning or component parts.

FDX-10 Balanced Diaphragm First Stage
Forged from marine-grade brass, the FDX-10 features optimized air paths and angled hose ports for superior performance and comfort. A sealed Balanced Diaphragm design, Enviro Kit and patented DRT (Dry Regulator Technology) isolate all internal components from the environment. 2 high pressure and 4 low pressure ports allow convenient and comfortable hose routing.

FEATURES & FUNCTIONS	DELTA 4 SECOND STAGE
Valve Type	DEMAND
Adjustment	KNOB/PRE-DIVE SWITCH
Balancing System	MECHANICAL
Integrated Purge Button	YES
Mouthpiece	ORTHODONTIC
Nitrox Compatibility	STANDARD TO 40%
Ambidextrous
Integrated Swivel	YES
Weight (without hose)	6.8 OUNCES
Dimensions (front profile)	2.67 INCHES
First Stage Configurations	FDX-10
Minimum Cracking Effort	DIVER ADJUSTABLE
Factory Set Inhalation Effort	0.0 - 2.5 CIW*
Work of Breathing	.87 JOULES
Warranty	2 YEAR
Limited Lifetime Service Agreement	YES
30-Day Satisfaction Guarantee	YES

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The FDX10 is a great first stage. I really like the way the ports are angled, so that the hoses are much more streamlined. The Dry Valve Technology is also a bonus, I never have to worry about the dust cover not being on properly ever again. The Delta 4 is my favorite second stage regulator. The 30 degree inline swivel ensures it sits comfortably through an entire dive, putting an end to ‘jaw fatigue”. The fact that it is user adjustable is also fantastic, I can go from pool diving with my Scuba Rangers, to a deep wall dive, to shallow diving around the local piers and my reg will always perform just the way I like it. Combined with the FDX10 first stage this would be the best breathing regulator that I have dived on. Cheers, Mel Harbour Dive

The FDX 10 Delta4 is an exceptional regulator. Its superior flow rate makes it perfect for all types of diving. Whether I'm 60m down inside a wreck, battling a strong current or chasing a wayward student the Delta4 is an easy-breathing, reliable regulator that always performs above my expectations. Mick Jonkhoff PADI MSDT Instructor 107915 (13 years) TDI Deco Procedures Instructor 2060 (9 years) Diver 22 years