I’ve got a Garmin 820 which I use for navigation, I’ve been setting Waypoints etc but I know there are many features that I don’t use. To start with I can see there are a few “Sailing Features” that I don’t use, such as Laylines, I’d like to know how they can help me with my sailing. Can anyone out there give me an example of when to use this feature and how it helped them? Regards, Tracy