Never knew what DLG stood for, not many glider guys in the area. Seen one two weeks ago and was amazed.
It is a elusive sport with acronyms LOL. DLG, HLG, RES, F3K, F5J... ect It's taken me some time to understand some of them.
SS - Slope Soaring (wind hits a pinnacle of some sort to allow moving air to rise upward from it - producing lift
DLG - Discus Launch Glider (Spin around in a circle holding the glider from the wing tip to launch)
HLG - Hand Launch Glider (Usually belly hand launching)
RES - is a series of classes for thermal duration gliders - mostly aero towing
F3K - competition DLG gliding with mostly 1.5m gliders - timed
F5J - competition gliders about 3m, usually 30sec power pod to get to altitude or to use thoughout the flight, scored on many factors - timed. This one is getting a lot of attention as it doesn't require discuss launch/towing/bungie so lots of old timers are taking it on and bringing their skills from RES with them.
What amazes me is since most gliders have a very efficient and thin airfoil - they can fly in very windy conditions successfully. Something that never occurred to me before entering this part of the hobby.