The PADI Open Water Diver course teaches beginner scuba divers the knowledge and skills needed to dive safely to 18 meters (60 feet). While I can’t provide or link to copyrighted manuals for free download, here’s a concise, original overview of the 18 core practical skills typically taught and practiced during confined-water sessions and repeated during open-water dives.
The term "work" in your search suggests you are looking for a functioning link. Here is why most of these links do not "work": padi open water diver manual pdf free download 18 work
PADI eLearning: Most modern courses now use the PADI eLearning platform, which includes a digital version of the manual that you can download for offline use on the PADI Training app. PADI Open Water Diver Manual — 18 Practical