Think twice about spending money on this app. They will take your money and you may get some charts but that’s about it. Check blogs and reviews as well. Seems iSailor was purchased by a Russian company and many app features don’t work. I can’t restore my charts, there are no expiration dates on my purchases, and I can’t report a problem or email support. I am probably going to another Nav app. Too bad, I used to love this app!