Comparison
PADI Open Water vs SSI Open Water
Your first scuba certification: compare the training, depth, course package and support that matter when learning to dive.
Both courses teach beginner divers through knowledge development, confined-water practice and open-water training. For an adult, the usual certification depth is 18 metres, within the conditions and limits of the training received.
The important booking decision is how the course is delivered. Compare two real local offers, including the time available to practise, rather than trying to choose a universal winner between agencies.
Reviewed 30 September 2026 · Official agency sources below
At a glance
| Compare | PADI | SSI |
|---|---|---|
| Starting point | Beginner | Beginner |
| Learning format | Knowledge + confined water + open water | Knowledge + confined water + open water |
| Adult depth | Up to 18 m within training limits | Up to 18 m within training limits |
| Compare locally | Class size, timetable and full quote | Class size, timetable and full quote |
PADI Open Water Diver
PADI’s entry-level scuba certification, with four open-water training dives.
Strengths
- Theory, confined-water skills and open-water application
- A foundation for later PADI courses
Limits
- Online learning alone does not complete certification
- Junior divers have additional restrictions
Best for: Beginners who find a PADI instructor and course schedule that suit their learning needs.
SSI Open Water Diver
SSI’s entry-level scuba certification, combining digital study and practical water training.
Strengths
- Confined-water practice before applying skills in open water
- A foundation for SSI continuing education
Limits
- A course timetable is not a guarantee of certification
- Junior divers have additional restrictions
Best for: Beginners whose preferred SSI centre offers the right practice time, sites and follow-up.
Ask for the actual water schedule: pool location, open-water sites, boat or shore access and how much time is allocated each day. A course taught close to home can make extra practice easier; a holiday course needs enough spare time for delays.
Request a complete AUD price covering materials, equipment, certification and site or boat charges. Ask which items you must supply and whether additional coaching costs extra.
Ask what exposure protection is supplied and how entries, exits and visibility will be managed at the proposed sites. The aim is to become comfortable in the environment where you expect to continue diving.
Tell the instructor about concerns before booking. Their response about pacing, group size and extra sessions is more useful than an agency slogan.
Plan some supported local dives to consolidate your skills. Ask whether the centre offers club trips, guided dives or equipment hire, and how they help a newly qualified diver select a suitable site.
If you later choose another agency, have the receiving instructor check the next course’s prerequisites. Keep your certification and dive records accessible.
The honest answer
Choose the beginner course with clear inclusions, enough practice time and a team you feel comfortable learning with. A lower price is only useful when you understand what it includes.
PADI Open Water vs SSI Open Water FAQs
Does paying for eLearning make me certified?
No. Required practical training and assessments must also be completed before certification.
Does the adult 18-metre limit apply to every child?
No. Junior certifications have age-specific depth and supervision restrictions. Ask the instructor for the rules that apply to the student’s age.
Sources
What the verified statements on this page are based on. We link primary sources so you can check them yourself — and so you can see the date they were consulted.
- PADI — Open Water course diveschecked September 2026
- PADI — certification FAQschecked September 2026
- SSI — Open Water Diverchecked September 2026
Choose your next step
Start with your experience level. Compare the training and the package before choosing a centre.
Start with the PADI vs SSI agency guide →