The AOWD is the second level qualification in the American system, following the Open Water Diver qualification (OWD). At the OWD level divers gain basic knowledge of skills, equipment and theory for diving to a recommended depth of about 18 metres (60 ft). The AOWD is described by PADI as refining these skills, allowing the diver to explore a broader variety of diving to a maximum of 30 metres (100 ft) deep.[citation needed] Critics point out that the AOWD course consists of a single navigation dive, a single deeper dive and a choice of three "adventure" dives whose primary purpose, these critics feel, is to provide an opportunity to sell the student a specialty course rather than to impart any particular level of competence in a new activity. Prior to entering an AOWD equivalent course, some organizations have logged dives prerequisites. The course usually contains some mandatory dives and knowledge while a certain portion of the course consists of free elective topics such as drift diving or search and recovery.
The European international dive education system, CMAS, recognizes only three main levels of dive education indicated by a one star, two star, or three star designation. One star indicates an ability to dive, two star indicates additional skill of rescuing divers, and three star indicates the additional skill in leading a group of divers.
MINIMUM
Windows 98/2000/ME/XP
Pentium III or AMD Athlon 800MHz Processor
256MB RAM
2GB Hard Disk Space
Nvidia TNT2, GeForce 1, 2 or 3, ATI Radeon 7000, 7200, 7500 or 8500, or Matrox G450 Video Card
DirectX Compatible Sound Card
DirectX 9
MAXIMUM
Windows 7/Vista (32 or 64 bit)
Intel i7 Quad Core 2.8Ghz or AMD equivalent
3GB System RAM (High)
30 GB Hard dDisk Space
nVidia GeForce 9800 GTX / ATI Radeon HD4850 Video Card
Direct X 9.0 compatible supporting Dolby Digital Live
DirectX 9.0 - DirectX 11
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