this is a link to a site for the beta version of an underwater simulation. I have inquire to the programer if real time barometric charts could be built into the simulation , to create a learning tool for uw navigation. for simulator see: http://people.ne.mediaone.net/olivier-zegdoun/ for underwater charts see: http://www.maptech.com/oneclick/oneclick.tour.cfm?TOUR_TYPE=cp&TOUR_PAGE=2&I NC=NONE regards and bubles Gabriel.