I have just downloaded the Navionics App to my iPhone 3G which gives me nautical charts for my area of boating - New Zealand. Fantastic app - highly recommended if you need such a thing. Is it possible to connect a say 15 inch monitor to the iPhone to be able to have a larger view of the charts in the cockpit of the boat. The 15 inch monitor simply needs to show the iPhone's screen - there is no need for interactivity via the 15 inch screen as the GPS dot always stays in the centre of the iPhone screen. I think it's possible to connect a TV screen via composite leads - but the resolution would be too low for the fine detail of a nautical chart.