The PADI Advanced Open Water Certification requires five dives. You choose the specialization for three of the dives but deep water diving and underwater navigation are required for the remaining two dives. You need to familiarize yourself with the modules in your manual relating to your chosen specialization, do the review exercises at the end of each module and give them to your instructor to be checked. If you are not interested in the night dive specialty dive, or a night dive is not available during your stay, you can choose the 3 days option and enjoy an extra fun dive.   3 Days – $420 USD (5 specialty Dives + 1 Fun Dive)