The tracks up to and including 2008 are approximate or drawn in and are not to be used for navigation.
The tracks for 2009 onwards are GPS based and are in places more trustworthy than the charts. NNW of Symi is a good example. None of the tracks resulted in any drama. Safe depth at least 1.5 metres probably 2.0 metres. These will be helpful to those without local knowledge as being at the least a guide to planning a safe approach but are not offered as an aid to navigation.