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Underwater Oahu
85-491 Farrington Hwy
Waianae, HI 96792
Uber
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Daily Boat Dives
Try Scuba Diving
Open Water Scuba Diver
Night Diving
Rebreather Diving
Technical Diving
Diver Training & Certification
Dive Club
Tank Air Fills
Scuba Gear Service & Repair
Scuba Rentals
Buy Scuba Gear
Daily Boat Dives
Daily Boat Diving Availability
West Oahu is the Best for Year-Round Diving
Underwater Oahu offers daily 2-tank scuba tours as well as monthly special event dives and night dives on Oahu. A short boat ride away and just below the surface is another world. A world of vivid turquoise waters, abundant with beautiful corals, teeming with an amazing variety of colorful reef fish. Explore wartime wrecks, lava tubes, caverns and coral reefs where dolphins, spotted eagle rays, turtles and tropical fish are your dive companions. Although we primarily dive the west side of Oahu, we also do boat diving on other parts of Oahu. So call today to check availability and book your seat!
Cancellation Policy
Changes or cancellations can be made to a boat diving reservation no less than 48-hours prior to the scheduled "show time" for the dive, with no cost or penalty to you. However, you must speak to one of the staff and receive a written confirmation of the cancellation/change for it to be valid (Leaving a voice message is not valid). You are fully responsible for the cost of the dive if you change or cancel your reservation inside the 48-hour window. Your confirmed booking constitutes your agreement to this policy
Daily Boat Diving Availability - Pricing
Certified Diver with Rental Gear
$170.00
Includes all rental gear for your dives.
Certified Diver without Rental Gear
$145.00
Only Tanks and Weights are provided
Private Boat Charter
$800.00 – $1,800.00
Call for availability and options
Single Rental Item add-on
$8.00 – $12.50
If you only need 1 or 2 pieces of rental gear for your dive
Try Scuba Diving
Looking For A New Adventure?
$179.00
Try Scuba Diving! It's your opportunity to discover the magical world of colorful fish and living reefs in Hawaii's crystal clear blue and warm water – Scuba Diving! There's nothing like it. Scuba Diving is much easier than you think and our Try Scuba Diving experience will prepare you to participate in this new sport that awaits you
What's involved
We'll take you to a either a local beach or on one of our boats, where the conditions are flat and calm, much like a swimming pool. For shore dives, you'll be walk into the shallow water with your gear on and practice some basic scuba skills with your instructor. For boat dives, you will be helped into the water by your instructor and the boat crew, after we have tied the boat off to a mooring. Once you are comfortable, your instructor will take you on a tour of our beautiful coral-covered lava reefs, where you can see our majestic sea turtles and hundreds of tropical reef creatures.
Want to get started?
Please call our shop to set up your Try Scuba Diving experience. We require a minimum of 24 hours notice prior to the experience to get everything set up for you.. We will bring water and light snacks for you as well. Let's go diving!
Open Water Scuba Diver
Prerequisites
All you need to begin the SCUBA Diver course is the ability to swim and the desire to learn to dive. Minimum Age: 12 (Jr Scuba Scuba Diver – Age 10)
The Fun Part
The fun part about this course is well, just about all of it because learning to dive is incredible. You breathe underwater for the first time (something you'll never forget) and learn what you need to know to become a certified diver
What You Learn
The first part of the class is the online independent study section, or e-Learning.
You will be provided an e-Learning access code when you sign up for the class. You can study at your own pace and take all of the exams in the comfort of your own home through the eLearning website. Instructors will be available for consultation through the website, email, by phone or you can drop by the shop
The second portion of the class allows you to learn and practice the skills introduced in the independent study portion of the course in a swimming pool under the guidance of an instructor.
The class concludes with several open-ocean scuba dives with an instructor.
Upon successfully completing the dives you will be certified as an Open Water Scuba Diver
Certifications Available Include:
NAUI (Group or Private Instruction)
SSI (Group or Private Instruction)
SDI (Private Instruction Only)
PADI (Private Instruction Only)
Open Water Scuba Diver - Pricing
Which Open Water class are you interested in?
Group
$499.00
4 or more people. Personal Mask, snorkel, and fins required. Great for larger groups
Semi-Private
$599.00
1 to 4 people. All gear provided. Great for smaller groups or individuals.
Private
$999.00
Guaranteed 1 on 1 instruction. All gear provided. Customize your course to meet your needs.
Referral
$399.00
must have completed all confined and academic work) - Includes 4 Dives
Night Diving
Why dive at night?
Because a whole different cast of characters come out at night! Night octopus, conger and moray eels, lobsters and crabs are just some of the nocturnal marine life that we see on our night dives. Underwater Oahu conducts at least one night boat dive per month as well as a night shore dive when there is interest
For night 2-tank boat dives, tanks, weights, water and light snacks are provided.
Divers can rent gear and lights if needed
Rebreather
Rebreather Diving
Getting close to marine life without bubbles or noise to scare them away is an absolutely wonderful experience. Underwater Oahu provides recreational and technical training and certification for closed-circuit rebreathers (CCR)
How A CCR Works
A CCR uses gas more efficiently than open-circuit scuba systems by circulating the breathing gas around the diver via "the Loop" allowing them to "re-breathe" their gas, instead of exhaling gas straight out into the water as in a traditional "open-circuit" scuba system. The closed-circuit rebreather system allows you to stay underwater for several hours so you can take your time and enjoy the little (and big) things you will see. During these hours of diving, you will be very comfortable because, unlike open-circuit scuba gear that delivers cold compressed air, a CCR circulates warm, humid gas at ambient pressure (which is just like breathing above surface)
Not Just For Technical Divers
Once used exclusively by technical divers, CCRs are now available for use by recreational divers as well, thanks to the development of Type-R (recreational) closed-circuit rebreather. These CCRs are lightweight, easy-to-transport and have sophisticated electronics to simplify their use. Contact us today and learn how our Closed-Circuit Rebreather Diver courses allow you experience diving in a way you never imagined possible!
Technical Diving
The term technical diving or "tec diving" refers to a type of diving in which the diver is exceeding the depth limits associated
with recreational diving (beyond 30 meters/130 feet). This is also referred to as "extended range" diving. Tec diving requires specialized training in the use of the specific equipment required for this type of diving, dive planning, emergency procedures and gas mixtures
Underwater Oahu supports the full range of technical diving classes and activities for both open and closed circuit diving.
Owner/Instructor Trainer Michael Matzinger is ready to to help you reach your technical diving goals while on Oahu. All technical classes are kept small, 1 to 3 students, to enhance safety and maximize your experience. Technical-only charters are also available upon request
Technical Courses offered
Group Prices are available for for each course for groups of 2 or 3. Special pricing available when booking multiple courses at the same time
Intro to Technical Diving
Technical Sidemount Diving
Decompression Procedures
Advanced Nitrox
Titan Closed Circuit Rebreather
Diver Training and Certification
Choosing a Dive Center is an important decision. You are choosing who you are going to trust to teach you or a loved one skills to survive underwater. Underwater Oahu issues scuba certifications from different scuba agencies, including:
NAUI (National Association of Underwater Instructors)
SSI (Scuba Schools International)
PADI (Professional Association of Diving Instructors)
TDI (Technical Diving International)
SDI (Scuba Diving International)
DAN (Divers Alert Network)
EFR (Emergency First Responder)
With that in mind
We can guaranty all of this for you – our competitors cannot. Do your due diligence before trusting your life to a scuba company. We're confident you will choose the safest option – Underwater Oahu!
You deserve a scuba diving company who employs instructors and divemasters who are professional and true experts in their field.
You deserve to be safe when you're diving.
You deserve to dive with a scuba company that has a proven and verifiable, unblemished safety record.
Advanced Open Water Diver
The Advanced Open Water Diver course is actually the second part of a two-step process designed to help create better-trained, more thoroughly prepared entry-level divers. Therefore, it is not really an "Advanced" course per se, but rather a more advanced Open Water Diver course (as opposed to the basic Open Water Diver course). The Advanced course focuses on three areas:
Review and enhancement of basic core skills
Natural and compass navigation
Planning and making dives to 30m/100ft
Advanced Open Water Diver Info
We will also conduct a wreck dive, a night dive and a marine life identification dive.
Prerequisites
Open Water Scuba Diver certification from any internationally-recognized agency (NAUI, SDI, NASE, PADI, etc.)
When to Take the Advanced Course
After completing your SCUBA diver training, the Advanced Course is designed to be taken immediately after. You'll be introduced to the the areas of diving that interest you while gaining practical experience under the supervision of our expert SCUBA instructors
Certifications Available Include:
NAUI Advanced SCUBA Diver
SSI Advanced Adventurer
SDI Advanced Adventure Diver
PADI Advanced Open Water Diver
Advanced Open Water Diver - Pricing
Which Advanced Open Water class are you interested in?
Group Course
$549.00
4 or more people. Rental Gear NOT Included. Great for larger groups
Semi-Private
$649.00
1 to 4 people. All gear provided. Great for smaller groups or individuals.
Private Course
$899.00
Guaranteed 1 on 1 instruction. All gear provided. Customize your course to meet your needs.
Master Scuba Diver
With the Master Scuba Diver rating, you have reached the highest non-professional level in diver education. It means that you have acquired significant training and experience in a variety of dive environments. Master Scuba Diver certification is required prior to taking any professional certification courses for NAUI and NASE
Master Scuba Diver Rating!
Sharpen Your Skills with the Master Scuba Diver rating! The NAUI Master Scuba Diver course involves specific training in the theory and practice of:
Emergency procedures and rescue
Deep/simulated decompression diving
Limited visibility or night diving
Underwater navigation
Search & recovery – light salvage
Certifications Available Include
NAUI Master SCUBA Diver
SDI Master SCUBA Diver
SSI Master Scuba Diver
PADI Master SCUBA Diver
Master Scuba Diver - Pricing
Which open water class are you interested in?
Semi-Private NAUI Course
$599.00
1 to 4 people. All gear provided. Great for smaller groups or individuals.
Private NAUI Course
$699.00
Guaranteed 1 on 1 instruction. All gear provided. Customize your course to meet your needs.
Emergency Provider Courses
Underwater Oahu teaches certification classes for the non-professional emergency provider. Certifications are available through NAUI, Divers Alert Network (DAN) and Emergency First Responder (EFR). The question is if not IF you will ever be in a position to help someone in need, it is definitely a question of WHEN. When the time comes, you'll need to be prepared. Contact us for more information about any of these emergency provider courses. Certification classes we teach include:
DAN
$99.00 – $599.00
First Aid & CPR for Scuba Diving Injuries, AED Provider, Oxygen Provider for Scuba Diving Injuries, Diving First Aid for Professionals
EFR
$89.00 – $149.00
CPR, First Aid, AED and Oxygen Provider for Scuba Diving Injuries, First Aid for Hazardous Marine Life Injuries
We also provide re-certification courses for the above skills/agencies.
Rescue Diver
We believe this scuba rescue diver course the most important dive course that you can take.
It's both "challenging" and "rewarding" because the training builds upon the skills you already know about preventing problems and managing them when they occur
Additionally, you will learn how to assist other divers and enjoy the comfort of being able to handle situations as they happen.
This course is also your first step on the way to becoming a dive professional
Upon completing the course, we often hear divers say that the Scuba Rescue Diver is the best course they've ever taken.
What You Learn
Self rescue
Recognizing and managing stress in other divers
Emergency management and equipment
Rescuing panicked divers
Rescuing unresponsive divers
Certifications Available
NAUI SCUBA Rescue Diver / Advanced Scuba Rescue Diver
SSI Stress & Rescue
SDI Rescue Diver
PADI Rescue Diver
Scuba Rescue Diver - Pricing
Which open water class are you interested in?
Group Course
$499.00
4 or more people. Personal Mask, snorkel, and fins required. Great for larger groups
Semi-Private
$599.00
1 to 4 people. All gear provided. Great for smaller groups or individuals.
Private Course
$849.00
Guaranteed 1 on 1 instruction. All gear provided. Customize your course to meet your needs.
DiveMaster
Looking for the first step in working with scuba as a career? Your adventure into the professional levels of recreational scuba diving begins with the Divemaster program. Working closely with an Instructor, in this program you expand your dive knowledge and hone your skills to the professional level. Divemaster training develops your leadership abilities, qualifying you to supervise dive activities and assist instructors with student divers. Divemaster is the prerequisite certification for Open Water Scuba Instructor certifications
Prerequisites
Master SCUBA Diver (for NAUI Divemaster only)
Rescue SCUBA Diver
DFAPro or CPR, First Aid, AED, and Oxygen Provider
60 Logged Dives
Minimum Age: 18
What You Learn
During the Divemaster program, you learn dive leadership skills through independent study and practical application.
You complete water skills and stamina exercises, as well as training exercises that stretch your ability to organize and solve problems as well as help others improve their scuba skills. You put this knowledge into action through a structured internship and a series of practical training exercises
What You Can Do
After becoming certified as Divemaster you will be authorized to:
Supervise both training and non-training-related activities by planning, organizing and directing dives
Assist an Instructor during the training sessions for any SCUBA Diver course
Conduct the Local Diving Orientation experiences
Conduct the Scuba Review programs
Independently guide students on the tour portion of Open Water SCUBA Diver courses.
Conduct subsequent dives under an instructor's indirect supervision
for Introductory Dive (non-certified) participants after participants have satisfactorily completed the first dive with an Instructor
Accompany Scuba Diver Students Under the Indirect Supervision of an Instructor During
An Instructor will accompany student divers during Advanced SCUBA Diver or during Specialty Diver training dives
Surface swims to and from the entry/exit point and during navigational exercises
When the instructor conducts a skill
such as an ascent or descent, a Divemaster can remain with other student divers (with an individual student or buddy team)
NAUI Scuba Instructor
We believe that to truly learn something, people need to have an experienced teacher guiding them. The better that teacher is at relating to their students through effective communication skills, patience, empathy and an understanding of the different ways that people learn, the more effective they will be at helping a student grasp the concepts involved in scuba diving. We select candidates who believe that to be able teach people to be the best divers, they need to be taught by the best instructors. Our instructor candidates are the best because we hold them to a higher standard. Instead of requiring them to learn and demonstrate only the "minimum required standards", we make our candidates exceed those minimum standards as well as demonstrate a high level of proficiency and excellence in everything they do. Contact us to learn more about our instructor training programs
NAUI Instructor Training Course (ITC) Prerequisites
Minimum Age
18 years at the time of enrollment
Minimum Experience
150 required logged dives that are varied in environment and depth. This means if you dive all of your dives in the same location, at same depth in the same conditions all the time, we're only going to accept a portion of them toward the required total
CPR & First Aid Certification
Current certification or verified competency in CPR and First Aid is required for registration. Training must include Adult, Child, and Infant CPR
Medical Approval
Verification of good physical condition as documented by a medical examination and unconditional approval for diving by a licensed physician within the preceding 12 months
Administrative Requirements
Submit a complete course application, provide and be responsible for personal dive gear suitable for open water and provide all required texts and materials
Info
All Instructor Candidates will be required to take the NAUI Instructor Prequalification Exam prior to entering the course and must pass with a score of 75% or better.
Instructor Candidates will also be required to pass the Instructor Final Written Examination with a score of 75% or better
Underwater Oahu offers NAUI and SSI crossover courses
for open water scuba instructors from other recognized agencies and who are current members in good standing with their respective agencies
Contact us to learn more about our instructor training programs.
Required SCUBA Certifications
Advanced Open Water
Scuba Rescue Diver
NAUI Master Scuba Diver or Equivalent from another recognized agency
NAUI Divemaster or equivalent certification from approved agencies
Speciality Diver Courses
Deep Diver (NAUI –SSI – SDI – PADI)
Does the thought of deep diving fascinate you? If you are at least 18 and have an Advanced Open Water Scuba Diver certification from an approved agency, you can enroll in a Deep Diver course where you'll gain the knowledge and skills to plan and make enjoyable deep dives while minimizing risks of deep diving. Although this is not a decompression techniques course, you will learn about decompression procedures including nitrogen narcosis and decompression sickness, and the use of dive computers including avoiding the need for stage decompression. Your course will also include teachings on the purpose, problems, hazards, planning, preparation, equipment, air supplies, personnel, techniques, gas management, emergency procedures, and depth limits for recreational diving. Deep diving is defined as dives made between 60 feet / 18 meters and 130 feet / 40 meters
Wreck Diver – Limited Penetration (SDI – PADI)
Wreck diving can be one of the most exciting aspects of sport diving, however every effort must be made to maximize safe diving techniques. The Wreck Diver Course will discuss the equipment and techniques commonly employed while wreck diving. This course may be taught as a limited-penetration course, requiring 3 dives. Limited-penetration is defined as a swim through or within the ambient light of entry point
Night Diver (NAUI – SSI – SDI – PADI)
Many divers find that night diving is their favorite type of diving. As with all specialty diving applications, procedures are different than those associated with open water diving. The purpose of this course is to acquaint the open water diver with the procedures, techniques, and potential hazards associated with diving at night, or in limited visibility. Becoming familiar with the use of dive lights, and night diving techniques such as navigation, buddy system procedures, communications, buoyancy control, and interacting with nocturnal aquatic life, the diver can safely enjoy night diving
Enriched Air Nitrox Diver (NAUI – TDI – SSI – SDI – PADI)
Want to extend your bottom time, lessen your surface interval, and maximize every dive? Become an Enriched Air Nitrox diver! You will learn how to choose the proper blend of Nitrox for your dive profile, determine maximum depth limits for your Nitrox mixture, analyze your breathing mixture, and plan and safely execute each dive. During the e-Learning academic portion of the course, you will learn about the physiology of oxygen and nitrogen; advantages, disadvantages, and risks of nitrox; oxygen toxicity; hazards and precautions of handling oxygen; the concept of Equivalent Air Depth; use of EANx with standard Air Dive Tables; common gas mixing procedures; and more. After your exam, you can complete two dives to receive your Nitrox Diver certification card. And, we can integrate your Nitrox course into your Scuba Diver or Advanced course!
Underwater Archaeologist (NAUI)
Qualified divers are essential to collect and record archaeological data on submerged cultural resources and often perform invaluable volunteer assistance to accredited archaeologists by assisting during field work. In the Underwater Archaeologist course you will learn specific skills and knowledge that are helpful for wreck diving activities and provide increased enjoyment when visiting submerged cultural resources. You'll gain the basic information and skills that are used in underwater archaeological interpretation of wreck and other sites, as well as mapping, sketching, and researching techniques
Underwater Photographer or Videographer (SSI –SDI – PADI)
Our underwater environment presents divers with scenes of breathtaking beauty with wild and weird creatures that amaze and fascinate. How can you possibly remember each one unless you bring them back through photography or videography? In the Underwater Photographer and Videographer courses you will be taught the skills, techniques, and tricks of underwater photography including lighting, use of photographic equipment, the fundamentals of photography, underwater camera techniques, and underwater photo problems. For added interest, you can combine other diving courses or activities to provide additional photographic opportunities
Diver Propulsion Vehicle (NAUI – SSI – SDI – PADI)
DPVs offer a thrilling way for scuba divers to see a lot of underwater territory in a short amount of time. They scoot you through the water allowing you to glide over reefs, buzz around a large wreck or weave through a kelp forest. Whether making a shore or boat dive, a DPV is a great way to see more and have fun doing it. If you're at least 12 years old and a (Junior) Open Water Diver or higher, you can enroll in the Diver Propulsion Vehicle course
Full-Face Mask Diver (NAUI – SDI)
Divers often have a need, or want, to effectively communicate underwater. The SDI Full Face Mask Course is the perfect starting point. Full face mask diving allows the diver to relax and enjoy diving while not worrying about maintaining the second stage regulator. In addition, the full face mask will help insulate the diver from a coldwater environment
Underwater Ecologist: Coral Reef (NAUI – SSI – SDI – PADI)
Coral reefs are primarily found in three major biogeographic regions of the world: The tropical western Atlantic (Caribbean), the Red Sea, and the Indo-Pacific region. Coral colonies are composed of thousands of tiny polyps, each with its own protective skeleton. The Underwater Ecologist (Coral Reef) specialty course focuses on the vertebrates and invertebrates of the complex living reef. This course examines coral zonation, seagrass beds, lagoons, mangroves, and the common reef algae, invertebrates and reef fishes
Underwater Environment (NAUI – SDI)
Want to learn more about the underwater environment in which you dive? Enroll in an Underwater Environment course and learn about the physical and biological aspects of the diving environment with emphasis on your local area. You'll study related sciences, such as oceanography, limnology, geology, biology, and ecology, and learn about various types of plant and animal life, conservation and pollution issues, the characteristics of water movement, shore, bottom and surface conditions, and how to plan dives in diverse diving locations. Your course may include trips to aquariums or oceanariums, exposing you to several diving environments such as lakes or the ocean, rocky reefs, and sand beaches. Whether you are a skin or scuba diver, an Underwater Environment course will catch your interest!
Search and Recovery Diver
At some point in your diving career, you or your buddy will either loose or find something underwater and the knowledge and skills you gain in the Search and Recovery Diver course will help you when you do! In your Search and Recovery Diver course you'll learn about underwater navigation using natural and compass techniques; the problems, methods, equipment, hazards, and safety procedures regarding limited visibility diving; proper search methods and techniques; and how to handle light salvage or recovery, including rigging and knot tying
Training Assistant (NAUI)
If you possess the desire to assist in the training of other divers, a Training Assistant specialty course might be for you. This course will qualify you in the skills and knowledge necessary to perform as a training assistant during diver training courses overseen by an active-status NAUI Instructor. As a certified NAUI Training Assistant, you will be qualified to temporarily directly supervise students while an instructor conducts skills with other students; escort students on the surface or on underwater tours; and assist an active-status NAUI Instructor with other tasks, all under the direction of a NAUI instructor. Compass navigation; underwater communications; assisting divers with cramps, anxiety, breathing difficulties, and signs of pre-panic; escorting a diver to safety; escorting divers during an open water dive; and performing a scuba diver rescue are just some of the techniques and skills you will learn during your course. To enroll in a Training Assistant course, you must be at least 18 years old, have the training and experience equivalent to at least NAUI Advanced Diver, have certification in NAUI Scuba Rescue Diver or equivalent, and have current CPR and First Aid certifications. While certification as a Training Assistant does not confer any NAUI Leadership certification, the experience, knowledge and confidence you gain working as a Training Assistant can help you achieve your goal of becoming a NAUI member!
Advanced Buoyancy Control
Introducing a diver to the benefits of controlling his buoyancy usually has a great positive effect, an effect that will enhance the diver's sense of enjoyment and feeling of accomplishment. This specialty is designed to increase the open water diver's understanding of the factors that influence buoyancy, and to train the diver how to use the means available to him as methods for controlling his buoyancy. The added benefits to the marine and freshwater environments, cannot be overstated; as well as a diver that has better control of himself in conjunction with his environment
Drift Diver (NAUI – SSI – SDI – PADI)
Drift diving allows a diver to travel over a large area without expending much energy. You simply get neutrally buoyant and enjoy the dive as the scenery moves past you. The SDI Drift Diver Course covers the "how-to's" of drift diving from, how to enter and exit drifts, what to do if you get caught in a drift and wish to get out, how to get out of the drift to observe something special, and much more. The course will also introduce you to the various types of drift currents you may be diving in
Sidemount Diver – Recreational (NAUI – SDI – PADI)
As equipment changes make diving easier, they are incorporated into diving. One of those changes has been sidemount cylinders. Sidemount cylinder use has exploded on the scuba diving scene. This course is designed to teach certified divers how to safely utilize side-mounted primary cylinders as an alternative to the traditional back-mounted configuration. The course is strictly non-decompression with a maximum depth limit of 40 metres/130 feet, or within the limit of the student's current certification, whichever is shallower
Yearly Membership Dues
Individual Membership
$100.00Additional Family Member
$75.00
Immediate Family Only
Junior Diver Member
$50.00
below 15 yrs
Membership Benefits
Free Member Only T-shirt
Available Starting Spring/Summer 2017
Membership/Punch Card
Boat Charters
$89.00
includes rental gear, tanks and weights
Boat Charters
$79.00
includes tanks and weights only
5 Buddy seats per year at club member price
Invitation to Yearly Off Island Trip
First access to specialty charters
Summer BBQ Shore Dives
Beginning Summer 2017
Free Birthday Dive
on your Birthday
2 Club Dives per month
Beginning Late Spring 2017
2 FREE air fills per day
2 Nitrox fills
- (per day) $10.00
Frequent Diver Card
10 boat dives = Next Dive at 1/2 Price
50% off gear rentals
10% off all store merchandise
10% off all classes
15% off dive gear packages
20% off yearly gear service
Breathing Tank Air Fills
Underwater Oahu provides standard breathing tank air fills as well as enriched air nitrox (up to 99% nitrox).
We pump our own clean, filtered air from the most powerful breathing air compressor in the state and can provide air fills for high pressure steel tanks too!
Are you a technical diver or rebreather diver in need of oxygen tank fills? Underwater Oahu can provide up to 99% aviation-grade oxygen fills as well!
What is the difference between aviation grade and medical grade oxygen?
Aviation and medical grade oxygen is actually the same USP (United States Pharmacopoeia) oxygen grade material.
The difference between the two grades actually is in the handling of the finished gas cylinder and the processing of the gas going into the cylinder. Aviation grade oxygen undergoes an additional drying process to prevent freezing at high altitudes where this gas is commonly utilized. The moisture content of aviation grade oxygen will be guaranteed and the cost of aviation grade oxygen is usually higher than that of medical grade oxygen. Medical grade oxygen cylinders are filled with the same gas as aviation grade cylinder less the extra moisture processing. Medical grade oxygen is handled and regulated in the same manner as a prescription drug so some users may have difficulty in obtaining this grade of gas
Dive Gear Service & Scuba Repair
Underwater Oahu technicians are factory-trained and certified to perform service and repairs on a variety of brands of scuba diving equipment, including:
Apeks
Aqua Lung
Atomic Aquatics
Hollis
Mares
Oceanic
ScubaPro
Zeagle Systems
Closed-Circuit Rebreathers
We are also certified to perform service and repairs to the following closed-circuit rebreathers:
Hollis Prizm2
Titan
Service Costs
Costs are for Labor ONLY, parts are extra
Regulator Inspection
Has it been a while since your last service or dive? Let us tell you if you regulator is preforming at its best
- (per reg set) $40.00
Regulator Overhaul
Get your reg back to operating like it did out of the box (or maybe better)
- (per stage) $50.00
Integrated Alternate Airsource & Inflator
$60.00
AIR2, AirSource (1, 2, or 3), AirXS, SS1, etc; Get you octo and BCD serviced for 1 price
BCD Inflator Overhaul and Cleaning
$40.00
Service your inflator plus get your BCD bladder cleaned out.
Rebreather
Call for information
- Call
Tank Visual Inspection - VIP + Air Fill
Required Annually
- (per tank) $15.00
Tank Hydrostatic Inspection - Hydro + Vip + Air Fill
Required every 5 years
- (per tank) $55.00
Tank Eddy Current Inspection
Required annually, but only required for some tanks manufactured before 1989.
- (per tank) $25.00
Need to rent scuba gear?
Underwater Oahu can outfit you in the latest and greatest, from a mask and snorkel to an entire set of gear. We rent:
Regulators and Gauge sets
Buoyancy Compensators
Wetsuits
Masks
Snorkels
Fins
Dive Float & Flag
Required by law if you are shore diving in Hawaii
Tanks
Aluminum 80CuFt & Aluminum 63CuFt
Weights
Buy Scuba Gear
When exploring the alien under-water world, you want to make sure you are using the most dependable, highest-quality scuba equipment available.
There's a saying that goes "The bitterness of poor quality remains long after the sweetness of a low price is forgotten"
It's wise to consider this when considering purchasing scuba equipment, especially "life support" items like regulators and buoyancy compensators.
You should purchase the highest quality that you can afford (you'll be thankful you did). Our philosophy: Buy the best, buy it one time and use it for the rest of your life
Manufacturers / Brands
Here are the manufacturers/brands that have passed our evaluation with flying colors, and for whom Underwater Oahu is an authorized dealer:
Apeks
Aqua Lung
Atomic
Bare
Deep See
Hollis
Ikelite
Innerspace Systems Corporation
Mares
Oceanic
Stahlsac
Trident Diving
XS Scuba
Zeagle Systems
Browse Nearby
General Info
Hours
Monday:
8:00am - 2:00pm
Tuesday:
Closed
Wednesday:
8:00am - 2:00pm
Thursday:
Closed
Friday:
8:00am - 2:00pm
Saturday:
8:00am - 2:00pm
Sunday:
8:00am - 2:00pm
About Us
Welcome to Underwater Oahu – Hawaii’s multiple award-winning scuba diving company. Come explore a world of vivid turquoise waters, abundant with beautiful corals, teeming with an amazing variety of colorful reef fish. Explore wrecks, lava tubes, caverns and coral reefs where dolphins, spotted eagle rays, turtles and tropical fish are your dive companions.