These are cue cards for PADI Instructors. Set of both Open Water portion and Confined Water portion of Open Water Course. Confined Water is v.2.06 rev.10/09. Open Water is v.2.06 rev. 08/09. Both sets are used but perfectly fine and are current as of checking the PADI website 09/2012. Retail price for both on PADI website is about $63!