- What This Cheat Sheet Covers (and What It Does Not)
- The Gate Facts: Age, Swim Test, Medical
- How the Course Is Built: Knowledge, Confined Water, Open Water
- The Numbers You Can Safely Quote
- Planning Dives and Choosing Gear
- Signals and Setting Up Your Gear
- Mask Clearing, Entries, and Exits
- Buoyancy and Basic Navigation
- Safety Procedures
- Pacing Your Review Across the Nine Topics
- Common Mix-Ups to Avoid
- Frequently Asked Questions
- PADI Open Water Diver assessment combines knowledge, confined-water skills, and four open-water dives; passing the written part alone never certifies you.
- Minimum age is 10; divers under 15 earn Junior certification, and medical screening is required.
- Watermanship means a 200 m/yd swim (or 300 m/yd with mask, fins, snorkel) plus a 10-minute float or tread.
- PADI's dated references document a 75% knowledge-exam threshold; confirm your current requirement with your instructor.
What This Cheat Sheet Covers (and What It Does Not)
This page is a one-page-style review for the PADI Open Water Diver course, the entry-level scuba certification issued by the Professional Association of Diving Instructors. It is not about an instructor rating, the Divemaster pathway, or another training agency's entry course. If you are still sorting out the basics of the credential itself, start with What Is OWD Certification? and come back here once the terminology is settled.
One honest framing note before the facts. The nine topic headings used below mirror the knowledge-development and practical-skills topics that PADI publishes in its Scuba Certification FAQ. They are an unweighted preparation curriculum, not nine official exam domains with published percentages, and not an exhaustive exam blueprint. Treat them as a study map, not a scoring formula. For a deeper walk through each area, see OWD Exam Domains 2026: Complete Guide to All 9 Content Areas.
The Gate Facts: Age, Swim Test, Medical
Before any knowledge review matters, you need to clear the eligibility gates. These are the items most worth memorizing because they are concrete and non-negotiable.
| Requirement | What to Remember |
|---|---|
| Minimum age | 10 years old |
| Under 15 | Earns Junior Open Water Diver certification |
| Medical | Required medical screening before in-water training |
| Swim option A | 200 metres/yards, any stroke, no time limit stated as a pass condition |
| Swim option B | 300 metres/yards with mask, fins, and snorkel |
| Float/tread | 10 minutes |
Notice that the swim is a choice between two options, not both, while the 10-minute float or tread is separate. For the full eligibility picture, including how medical screening works in practice, read OWD Requirements 2026: Eligibility, Prerequisites & How to Qualify.
How the Course Is Built: Knowledge, Confined Water, Open Water
The course has three parts, and certification requires all of them:
- Knowledge development, delivered through PADI eLearning and/or a PADI instructor, ending in a knowledge assessment.
- Confined-water skills, practiced in a pool or pool-like environment.
- Four open-water dives, supervised by an instructor.
The single most important structural fact: written knowledge alone does not confer certification. You can finish the eLearning with strong results and still not be certified until the in-water components are signed off. That is why searching for a standalone "OWD exam date" can mislead people; see OWD Exam Dates 2026: Testing Windows, Deadlines & Scheduling for how timing actually works across the course parts. Course hours, referral deadlines, and supervised dive time are scheduling and training matters, not written-exam timers.
The Numbers You Can Safely Quote
Numbers are where cheat sheets go wrong, so here is a deliberately short list of figures that are documented, along with the caveats that travel with them.
| Fact | Figure | Caveat |
|---|---|---|
| eLearning price (US catalog) | US$251 | Digital course only; in-water training and equipment are additional |
| Knowledge-exam threshold | 75% | Documented in PADI's 2020 eLearning FAQ and 2021 Instructor Manual; dated references, not a newly verified 2026 manual |
| Paper answer sheet | 50 items | Version 4.0, October 2013; a historical form that does not establish the current eLearning question count |
| Open-water dives | 4 | Supervised by an instructor |
| Certification expiry | None | Refresher after inactivity is distinct from renewal |
Two of these deserve extra emphasis. First, the US$251 figure is the digital course price, not an all-in certification cost; instructor-led pool and open-water sessions and gear come on top, and local pricing varies. Our breakdown in OWD Certification Cost 2026: Complete Pricing Breakdown explains how to budget for the whole path. Second, the 50-item answer sheet is a historical paper artifact. Do not tell yourself "the exam is 50 questions" as if it were a current rule.
On scoring, the 75% threshold and the instructor remediation process (your instructor reviews missed items with you rather than simply failing you out) are documented in dated PADI sources. Ask your instructor which standard applies to your course, and see OWD Passing Score 2026: Exactly What You Need to Pass for the detail.
Planning Dives and Choosing Gear
Topic 1: What to Consider When Planning Dives
Dive planning is about deciding whether, where, and how to dive before you ever get wet.
- Conditions at the site: visibility, water movement, entry and exit points
- Your own training level and comfort, plus the experience of your buddy
- Having a plan you and your buddy both understand before the dive
- Knowing when the right decision is to postpone or call the dive
Topic 2: How to Choose the Right Scuba Gear for You
Gear selection questions test whether you understand what each piece does and why fit matters, not brand knowledge.
- Mask fit and seal, since a leaking mask makes every skill harder
- Fins, exposure protection, and how they relate to water temperature
- The core equipment set: regulator, buoyancy control device, cylinder, gauges
- Why comfort and proper fit often matter more than features
Signals and Setting Up Your Gear
Topic 3: Underwater Signals and Other Diving Procedures
Underwater you cannot talk, so a shared hand-signal vocabulary is a safety system.
- Core signals: okay, problem, up, down, low on air, out of air, stop, and slow down
- Distinguishing "okay" from "I have a problem" instantly and without ambiguity
- Buddy procedures: staying together, checking in, and agreeing on signals pre-dive
- Surface signals to a boat or shore, including calling for assistance
Topic 4: Setting Up Your Scuba Gear
Assembly is a sequence you will repeat at every dive, and questions often probe the order and the checks.
- Attaching the BCD to the cylinder and securing the regulator
- Opening the cylinder valve slowly and confirming air pressure on the gauge
- Breathing the regulator before committing to it
- The pre-dive safety check with your buddy, from head to toe or by system
If you want these topics broken into a repeatable routine, the structured approach in OWD Study Guide 2026: How to Pass on Your First Attempt maps well onto this setup sequence.
Mask Clearing, Entries, and Exits
Topic 5: How to Get Water Out of Your Mask
Mask clearing is one of the signature confined-water skills, and the knowledge side covers the principle behind it.
- Keep breathing normally; flooding the mask is an inconvenience, not an emergency
- Look slightly up, press the upper frame, and exhale through your nose so air displaces the water
- Why staying calm matters more than speed
- Related skills like recovering and replacing a mask
Topic 6: Entering and Exiting the Water
Entries and exits are where gear gets damaged and divers get hurt on the surface.
- Choosing the entry appropriate to the site: from shore, from a boat, from a pool edge
- Securing your mask and regulator, and checking depth and footing before entering
- Controlling your gear weight on the way out of the water
- Using a stable, deliberate approach rather than rushing
Buoyancy and Basic Navigation
Topic 7: Buoyancy Control
Buoyancy is the skill that separates a comfortable diver from a struggling one, and it is a recurring theme throughout the course.
- Neutral buoyancy: neither sinking nor floating, hovering with minimal effort
- How your BCD and your breathing each influence buoyancy
- Weighting: too much or too little weight both create problems
- Why good buoyancy protects both you and the environment
Topic 8: Basic Underwater Navigation
Navigation at this level is about not getting lost and returning to your starting point.
- Natural navigation: reading the bottom, light, and landmarks
- Compass use for simple headings and reciprocal return courses
- Judging distance by time or kick cycles
- Planning your route so the turn-around point is deliberate
Safety Procedures
Topic 9: Safety Procedures
Safety content runs through the entire course, and questions here tend to reward conservative, buddy-based thinking.
- Controlled ascents and safety stops as standard practice
- Responding to low-air and out-of-air situations with your buddy
- Never holding your breath while ascending
- Recognizing and responding to problems early, before they escalate
Key Takeaway
When a question offers one answer that is calmer, slower, and more buddy-oriented than the others, it is usually pointing toward the intended response. Scuba safety logic rewards conservative choices.
Pacing Your Review Across the Nine Topics
Rather than a generic schedule, here is one tied directly to how these topics build on each other. Front-load the vocabulary-heavy gear and signals material, then move to skills, then finish with the judgment-heavy safety content.
Planning, Gear, and Signals
- Topics 1 to 3: planning, gear selection, and hand signals
- Memorize signals first; they are pure recall and pay off in every later topic
Setup and Core Skills
- Topics 4 to 6: assembly sequence, mask clearing, entries and exits
- Walk through the setup order aloud until it is automatic
Buoyancy, Navigation, and Safety
- Topics 7 to 9: buoyancy, navigation, and safety procedures
- Finish with safety because it draws on everything before it
Adjust the pace to your own course schedule; instructor-led courses may compress or stretch this. Once you have worked through the topics, test your recall with realistic questions on our OWD practice test site.
Common Mix-Ups to Avoid
- Confusing the knowledge assessment with certification. Passing the written part is one of several requirements; the in-water components still must be completed.
- Treating the 50-item answer sheet as the current exam length. It is a 2013 paper form and does not establish today's eLearning question count.
- Assuming the nine topics are weighted. They are unweighted preparation headings. Do not skip one because you assume it is "worth less."
- Equating eLearning price with total cost. The US$251 digital course excludes in-water training and equipment.
- Thinking certification expires. It does not. A refresher after a long gap is recommended practice, but it is not a renewal requirement.
- Mixing up credentials that share initials. Make sure the facts you study belong to PADI Open Water Diver; the overview in What Does OWD Stand For? clears up the naming.
If you are weighing how demanding all of this will feel, How Hard Is the OWD Exam? Complete Difficulty Guide 2026 gives a grounded perspective, and Is the OWD Certification Worth It? Complete ROI Analysis 2026 helps you decide whether the investment makes sense for your goals.
Frequently Asked Questions
The documented 50-item figure comes from a historical paper answer sheet (version 4.0, October 2013) and does not establish the current eLearning question count. Ask your instructor or check your eLearning course for the exact format you will face.
PADI's 2020 eLearning FAQ and 2021 Instructor Manual document a 75% threshold, along with instructor remediation for missed items. These are dated references, so confirm the current standard with your instructor.
No. Written knowledge alone does not confer certification. You must also complete confined-water skills and four open-water dives, along with meeting the eligibility requirements.
No, the certification does not expire. If you have been inactive for a long time, a refresher is a good idea, but it is distinct from renewal.
You need either a 200-metre/yard swim or a 300-metre/yard swim with mask, fins, and snorkel, plus a 10-minute float or tread. The minimum age is 10, and divers under 15 receive Junior certification.
For a broader look at what this credential can lead to after certification, OWD Jobs and OWD Salary Guide 2026: Complete Earnings Analysis are worth a read. And when you are ready to check your readiness against exam-style questions, head to the OWD Exam Prep practice test.