61km/h in 18 meter glider

61km/h was average speed during yesterdays task until we landed in the field.
I don't know how we were able to fly in such conditions , very weak thermals spaced 20km apart 10-20 gliders working together to find thermals. We were not able to climb higher than 600-700mAGL. The last thermal was the thermal which decided about results. Long low final glide to the field. At 200m we were still cruising covering an extra 5km.  I arrived close to our third turnpoint found a nice field and landed close to the road. Just 5 minutes later a British pilot Phil Jones landed beside me. To my surprise my crew Maria and George showed up just one hour after my landing report , retrieve was without any problems.