You can go to NavQuest.com and download all the charts you want FREE,
save as a .GPX

Other links:

Marine Chart Download - http://navquest.com/marinecharts.html

Trip Planning - http://navquest.com/trip.html

Float Plan - http://navquest.com/floatplan.asp

Marina Map - http://navquest.com/marinamap.asp

Dive Sites - http://navquest.com/divesite/divesite.asp

Shark Attack File - http://navquest.com/sharkattackfile/sharkattackfile.asp

World of Boating Radio - http://navquest.com/cms/cms.asp


Regards,

Gaspare