It’s not often that you see a group of snowboarders start their approach to a mountain by boat, but these aren’t your average snowboarders. In the first episode of “Horizon Lines,” Forrest Shearer, Jeremy Jones, Bryan Iguchi and surfer Kohl Christensen team up and head to Iceland in search of something new. There they hire a sailboat and anchor it in a bay near previously unridden lines and some waves to surf. This was one hell of an adventure.