level to / with the ground

wing-in-ground-effect amphibious craft; ground-effect vehicle (GEV); wing-in-ground-effect (WIG); ground-effect craft; wingship; flarecraft; ekranoplan

depot maintenance (beyond O and I level activities, performed in an industrial-type facility) / D-level maintenance

surveyor's level (surveying level, tbc)

ground level (GL)

ground level emission

above ground level (AGL)

altitude above ground level

below ground level

shelter below ground level

battle-ground / battle ground / battleground

Ground Observer 12 (GO 12 Ground Surveillance Radar, нім. Bodenüberwachungsradar)

vantage ground / vantage-ground

ground-to-ground guided missile

ground-to-ground rocket

ground/air communications / ground-air communication

alert level

assigned flight level

barrel bore wear level

base level assessment

counter IED operational / strategic level

cross-level

division level

division-corps-joint-command level

gun’s axis inclination level

High Level Planning Group (OSCE HLPG)

High Level Steering Group

high-level strategic guidance

intelligence staff officer (brigade, battalion & armored cavalry units level) (S2)

laser level

level flight

level of ambition (LoA)

level of command