After a couple unsuccessful attempts to find myself in a nice looking spawn point on a newly generated map, I decided to find one by myself. I made myself a boat and started my sail due north-east.
Three hours later, 15.000 meters further, I'm still on sail, looking not only for a decent land, but ANY land at all.
How vast are oceans in Minecraft 1.9 pre-release 3? Can I still hope for some highlands far away from my original spawn point?

