Open Water Diver
The entry-level certification that allows independent recreational diving to around 18 metres.
Open Water Diver is the foundation certification of recreational diving and the qualification the overwhelming majority of divers hold.
It certifies a diver to plan and conduct dives with a buddy, without professional supervision, within recreational limits — generally around 18 metres and always within no-decompression limits.
It is genuinely a licence to learn rather than a statement of competence. Most divers become substantially better in their first twenty dives after certification than during the course itself.
What the depth limit actually means
The commonly cited 18-metre limit is a training limit, not a hard physical boundary. It exists because the course does not cover the gas planning, narcosis awareness and shorter no-decompression limits that deeper diving involves.
Operators generally enforce it, and exceeding it without further training is how newly certified divers most often get into difficulty.
The first twenty dives
Certification is the beginning of experience, not the end. Buoyancy, air consumption and general comfort improve dramatically with repetition, and most of that improvement happens after the course.
Diving regularly in the first few months after certifying matters far more than which agency's card you hold.
Dive sites where Open Water Diver matters
Sites whose recommended minimum is Open Water, plus sites where the skills are directly useful.
Dive centres that teach at this level
Centres whose training capability covers this course. Availability, schedules and the exact agency programme vary; confirm with the centre.
Perth Scuba
ProfiledCanning Vale · Perth · WA
One of the most fully documented operations in Western Australia, covering recreational, professional, technical and freediving training alongside substantial equipment facilities.
perthscuba.com · (08) 9455 4448
Abyss Scuba Diving
ProfiledRamsgate · Sydney South & Botany Bay · NSW
A Sydney operation associated with training across recreational and technical levels, boat diving and equipment services.
abyss.com.au · +61 2 9583 9662
Dolphin Scuba Diving
ProfiledWelshpool · Perth · WA
A Perth business providing training, equipment and service support.
dolphinscuba.com.au · (08) 9353 2488
Eaglehawk Dive Centre
ProfiledEaglehawk Neck · Tasman Peninsula · TAS
The principal operation at Eaglehawk Neck, servicing the Tasman Peninsula's sea caves, walls and deeper wrecks.
eaglehawkdive.com.au · 0417 013 518
Dive Darwin
ProfiledDarwin · Darwin Harbour · NT
The main verified dive operation in the Northern Territory, offering recreational training through professional level alongside technical diving and a large specialty range.
divedarwin.com.au · +61 401 751 651
Frog Dive Sydney
ProfiledGladesville · Sydney South & Botany Bay · NSW
A Willoughby PADI 5 Star IDC founded in 1985, teaching recreational through Trimix and rebreather courses with PADI, SDI and TDI, and testing cylinders in-store.
frogdive.com.au · (02) 9958 5699
Pro Dive Sydney
ProfiledSt Peters · Sydney South & Botany Bay · NSW
Pro Dive's inner-Sydney training centre at Alexandria, close to Camp Cove, Clovelly, Gordons Bay and Bare Island, with courses to Divemaster, hire and servicing.
prodive.com.au · (02) 9665 6333
Dive Lord Howe
ProfiledLord Howe Island · Lord Howe Island · NSW
Lord Howe Island's major verified PADI operation, identified as a PADI 5 Star Dive Resort and running the island's certified diving, training and charters.
divelordhowe.com · (02) 6563 2253
Dive Centre Manly
ProfiledManly · Sydney South & Botany Bay · NSW
A Northern Beaches operation with a long-standing presence at Shelly Beach, offering recreational training, boat diving and technical pathways.
divesydney.com.au · (02) 9977 4355
Pro Dive Brookvale
ProfiledBrookvale · Sydney South & Botany Bay · NSW
Pro Dive's Northern Beaches centre at Brookvale, running the 43-foot dive boat Sea Life V alongside courses, hire, air fills and servicing.
prodive.com.au · (02) 9977 5966
Dive Centre Bondi
ProfiledBondi · Sydney South & Botany Bay · NSW
An Eastern Suburbs PADI 5 Star IDC on Bondi Road teaching through Instructor and technical levels, with air, Nitrox and Trimix fills and manufacturer-approved servicing.
divebondi.com.au · +61 2 9369 3855
Jetty Dive Centre
ProfiledCoffs Harbour · Coffs Harbour & Solitary Islands · NSW
Coffs Harbour's PADI 5 Star Instructor Development Centre, running the Solitary Islands dive fleet from the Jetty Strip with training, retail, Nitrox and whale swims.
jettydive.com.au · (02) 6651 1611
After the course
Your first dives after Open Water, state by state
The easiest, most rewarding sites for a newly certified diver, what a first boat day is like, what to hire and when to go.
Open Water Diver: frequently asked questions
Does Open Water certification expire?
No. However, operators commonly require a refresher if you have not dived in a year or more, and it is worth doing regardless.
Can I dive to 18 metres immediately?
Your certification permits it, but experience matters. Building up gradually with a buddy or guide is the sensible approach.
Which agency's Open Water is best?
The major agencies' entry-level courses meet comparable standards and are mutually recognised. The instructor matters far more than the agency.