Advanced Open Water adds five dives to your logbook, including a deep dive and a navigation dive, and raises your certified depth limit from 18 m to 30 m with most major training agencies. It doesn't teach dramatically new skills so much as give you supervised practice at depths and in conditions Open Water training never covers.
How many dives does Advanced Open Water actually require?
Most agencies structure it around five dives: a mandatory deep dive, a mandatory underwater navigation dive, and three elective "adventure dives" chosen from options like wreck, drift, or night diving. PADI's course follows this exact pattern; other agencies vary slightly on which dives are mandatory versus elective, so check the specific requirements if you're not going with PADI.
What depth limits change between Open Water and Advanced Open Water?
Open Water typically caps you at 18 m. Advanced Open Water raises that to 30 m, which is also the standard recreational depth limit most agencies set before requiring further specialty training like Deep Diver. That extra 12 m opens up a meaningful number of wreck and wall sites that sit just out of Open Water range.
Is Advanced Open Water worth it for a casual diver?
Often, yes, even for someone who never plans to go deep regularly. A lot of popular dive sites, wrecks especially, sit between 20 and 30 m, so the certification alone opens real destinations rather than just adding a depth number to your card. The navigation dive also tends to be the single most useful skill Open Water training glosses over, since getting genuinely lost underwater is more common than most new divers expect.
FAQ
Can I do Advanced Open Water right after getting certified? Yes, there's no mandatory logged-dive gap between the two courses with most agencies, though showing up with a bit more comfort and buoyancy control from a few fun dives first tends to make the course easier.
Does Advanced Open Water let me dive solo or lead others? No. It's still a supervised, guided-diving certification. Leading other divers or diving unsupervised requires further training like Rescue Diver and, eventually, Divemaster.