ADVANCED OPEN WATER - from 12 years on, after having taken the OPEN WATER license.  This course contains five different learning modules, from which you may choose three according your preference. Two modules, DEEP DIVER and UNDER WATER NAVIGATION belong to the course as fixed parts. The course lasts two days and you may dive up to a depth of 30 m internationally. If you are younger than 15 years, your maximum depth is 21 m.