You're on a boat! Achievement in Borderlands
You're on a boat!15
I bet you never thought you'd be here.
How to unlock You're on a boat!
When you enter the area Treachers Landing, open up your map. If you zoom out and look on the right side of the map, you can see a single dock all by itself. Just head over to the dock and jump on the boat holding a chest for the achievement.
Thanks to NumbArtist for the video.