Assertion: glider | /r/CapableOf | use thermal
Facets:
Source sentences:
text: Once launched, gliders try to gain height using thermals, ridge lift, lee waves or convergence zones and can remain airborne for hours.
text: They are able to use thermals (currents more buoyant than the surrounding air, usually caused by higher temperature) and orographic lift to climb to higher altitude and to glide for great distances.
text: Once launched, gliders try to gain height using thermals, ridge lift, lee waves or convergence zones and can remain airborne for hours.