With heavily processed primary,gliders could be partially visible to completely gone depending on the RAG map setting.When they are visible then thermalling gliders look like a windfarm.Single gliders can be mistaken for spurious because the of the low speed and intermittent returns.Some high performance ones like the ASH25 can show,where as the old K8 no chance.
I didn't ignore them.Just vectored the pilot around what I could see,or downgraded the service.If VFRs wanted to overfly the gliding site,then here's their frequency,and the pilot can talk to them.Class G
