In the last month we published on iTunes Store a new Navigation app, Aqua Map. It is a very simple and clear marine navigation app taking full advantage of retina iOS display. Being a new App is very cheap at the moment, with 1.99$ (2.99$ HD) you can download WHOLE US coastal charts for free. Pay attention, vector charts not raster chart and the internal rendering engine is extremely good. Please check out the details at http://www.globalaquamaps.com or search the app on iTunes store "Aqua Map".