Melbourne Cricket Ground | Jet Propulsion Laboratory | Sydney Cricket Ground | ground beetle | WACA Ground | Lord's Cricket Ground | Greater Underwater Propulsion Power Program | Advanced Landing Ground | Aberdeen Proving Ground | propulsion | North Marine Road Ground, Scarborough | Ground Zero | Dugway Proving Ground | Boleyn Ground | BGM-109G Ground Launched Cruise Missile | Victoria Ground | Old Trafford Cricket Ground | Edgbaston Cricket Ground | Russian Ground Forces | Old Trafford (football ground) | Nuclear marine propulsion | Northop Hall Cricket Club Ground | Marine Air-Ground Task Force | Japan Ground Self-Defense Force | Electrically powered spacecraft propulsion | Tony Hawk's Proving Ground | The Ground Truth | Seaview (football ground) | Racecourse Ground | Newton Ground, Saint Kitts and Nevis |
Astronauts rehearse Extra-vehicular activity tasks in underwater neutral buoyancy before attempting those tasks in space to gain an understanding that they cannot use their weight to provide a force and that they may move or reposition themselves if they provide a propulsive force in any vector, either planned or inadvertent.