frantically attempted to get free of the chair, beating arms and hands and head into the soft surface of the riverbed, sending up massive clouds of silt. Free from the waist up, though, she found that her legs below the knees were still trapped below the heavy weight of the chair.
Turning on her side, twisting painfully from the knees, she managed to angle her head far enough to let out a sputtering cough and take in another lungful of air. Then she turned her attention back to the chair, trying to push it up off the riverbed far enough to pull her legs free. The surface of the riverbed was soft and yielding, though, and the harder she pushed, the farther her hands sank down into the soil. The chair had not moved a centimeter.
The air pocket was shrinking fast, the helmet filling faster and faster, and unless she was able to extricate herself from the chair and reach the surface, Leena had only minutes left. She was trapped, and drowning.
If she could not lift the chair, and lacked the strength to pull her legs loose, her only option was to shovel away the silt beneath her, freeing her legs from below. The air remaining in the helmet slipped out in a steady stream of bubbles through the partially sealed hose, replaced by cold and murky water. The pounding of her heartbeat in Leena's ears increased, until she was sure her eardrums would burst. She had very little time to act.
Forcing herself to remain calm, Leena pressed back into the semblance of a sitting position on the overturned chair. This provided her space to move, with less than a meter between her head and torso and the soft floor of the riverbed. Then, tucking her head down, she bent at the waist, reaching down to her knees. She began to scrape furiously at the soft loam beneath her legs, like a dog digging to hide a bone, sending up flurries of silt.
It was like trying to dig a hole in wet beachsand as the tide rolled in. As soon as Leena scooped away a handful of the soil, the water pressure would push more in from all sides. Alternately scooping away with her hands, and pulling with all her strength at her legs, she managed to work her legs centimeter by centimeter out from under the heavy chair. After the first few seconds, she rose back into an inverted sitting position, tilting her head back and to one side to catch a quick breath, but there was so little air left in the helmet that she drew in as much water as oxygen. Racked by coughs, she steeled herself and returned to the task at hand.
It couldn't have taken more than a handful of seconds, far less than a full minute at any rate, but it seemed to Leena like an eternity before the ground gave way sufficiently for her to work her feet free.
Survival training winning a war of attrition with her mounting panic, Leena remembered the survival kit strapped to the side of the chair before pushing away to the surface. The clouds of dirt and silt she'd kicked up with her digging still hung around the area like a low, black fog, but Leena was able to feel her way to the airtight metal caseclipped to the chair's side. Her hand closing over the handle, Leena began to feel a glimmer of hope. The kit's contentsâemergency rations, signal flares, compass, medical supplies, knife, pistol and roundsâmade her feel equipped to handle whatever challenges this strange world might present. She'd survived the siege of Stalingrad, the state orphanages, several years of military service and cosmonaut training; she could survive anything.
Pushing away from the riverbed, Leena's vision was almost completely obscured. A combination of exhaustion, lack of oxygen, and the current-borne silt clouded her view. Fortunately for her, the designers of her pressure suit had anticipated the possibility of a water landing, if perhaps not the possibility of being trapped by the chair. Around the base of the helmet, which could not be detached from the suit, was a rubber collar. Leena pulled the release tab, and the collar