Can a Glider Fly Cross Country With No Vario?

Finally, the first flight of the year in my ASW27 sailplane - and I forgot my batteries. Is it possible to stay up in the air just by feel and even do a cross country flight? I was surprised by the results. Here is a map of the flight: http://www.onlinecontest.org/olc-2.0/... What a fun and beautiful soaring day. Thanks for watching. Bruno